79142374440 has 72 divisors (see below), whose sum is σ = 257230065690. Its totient is φ = 21103209792.

The previous prime is 79142374403. The next prime is 79142374463. The reversal of 79142374440 is 4447324197.

It can be written as a sum of positive squares in only one way, i.e., 71228136996 + 7914237444 = 266886^2 + 88962^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5330307 + ... + 5345133.

Almost surely, 2^79142374440 is an apocalyptic number.

It is an amenable number.

79142374440 is an abundant number, since it is smaller than the sum of its proper divisors (178087691250).

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

79142374440 is an equidigital number, since it uses as much as digits as its factorization.

79142374440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29671 (or 14837 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 79142374440 in words is "seventy-nine billion, one hundred forty-two million, three hundred seventy-four thousand, four hundred forty".