79402577940 has 768 divisors, whose sum is σ = 302199152640. Its totient is φ = 17142160896.

The previous prime is 79402577939. The next prime is 79402577971. The reversal of 79402577940 is 4977520497.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 487132299 + ... + 487132461.

It is an arithmetic number, because the mean of its divisors is an integer number (393488480).

Almost surely, 2^79402577940 is an apocalyptic number.

79402577940 is a gapful number since it is divisible by the number (70) 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 79402577940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151099576320).

79402577940 is an abundant number, since it is smaller than the sum of its proper divisors (222796574700).

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

79402577940 is a wasteful number, since it uses less digits than its factorization.

79402577940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The spelling of 79402577940 in words is "seventy-nine billion, four hundred two million, five hundred seventy-seven thousand, nine hundred forty".