2649787620 has 192 divisors, whose sum is σ = 8286437376. Its totient is φ = 629544960.

The previous prime is 2649787537. The next prime is 2649787627. The reversal of 2649787620 is 267879462.

2649787620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2649787620² = 14042748862210528800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2649787627) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1485249 + ... + 1487031.

It is an arithmetic number, because the mean of its divisors is an integer number (43158528).

Almost surely, 2^2649787620 is an apocalyptic number.

2649787620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2649787620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4143218688).

2649787620 is an abundant number, since it is smaller than the sum of its proper divisors (5636649756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2649787620 is a wasteful number, since it uses less digits than its factorization.

2649787620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1888 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The square root of 2649787620 is about 51476.0878466886. The cubic root of 2649787620 is about 1383.7905344449.

The spelling of 2649787620 in words is "two billion, six hundred forty-nine million, seven hundred eighty-seven thousand, six hundred twenty".