2500012780 has 48 divisors (see below), whose sum is σ = 5569966080. Its totient is φ = 939895488.

The previous prime is 2500012771. The next prime is 2500012783. The reversal of 2500012780 is 872100052.

It is not an unprimeable number, because it can be changed into a prime (2500012783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22359 + ... + 74161.

It is an arithmetic number, because the mean of its divisors is an integer number (116040960).

Almost surely, 2^2500012780 is an apocalyptic number.

2500012780 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 2500012780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2784983040).

2500012780 is an abundant number, since it is smaller than the sum of its proper divisors (3069953300).

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

2500012780 is a wasteful number, since it uses less digits than its factorization.

2500012780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51958 (or 51956 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2500012780 is about 50000.1277998367. The cubic root of 2500012780 is about 1357.2111209773.

The spelling of 2500012780 in words is "two billion, five hundred million, twelve thousand, seven hundred eighty".