2791278299880 has 768 divisors, whose sum is σ = 10806681600000. Its totient is φ = 611425013760.

The previous prime is 2791278299867. The next prime is 2791278299893. The reversal of 2791278299880 is 889928721972.

2791278299880 is a `hidden beast` number, since 279 + 1 + 278 + 2 + 9 + 9 + 8 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (2791278299867) and next prime (2791278299893).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 2791278299799 and 2791278299808.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6358264701 + ... + 6358265139.

It is an arithmetic number, because the mean of its divisors is an integer number (14071200000).

Almost surely, 2^{2791278299880} is an apocalyptic number.

2791278299880 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 2791278299880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5403340800000).

2791278299880 is an abundant number, since it is smaller than the sum of its proper divisors (8015403300120).

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

2791278299880 is a wasteful number, since it uses less digits than its factorization.

2791278299880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 72.

The spelling of 2791278299880 in words is "two trillion, seven hundred ninety-one billion, two hundred seventy-eight million, two hundred ninety-nine thousand, eight hundred eighty".