78354571792 has 80 divisors (see below), whose sum is σ = 183261540352. Its totient is φ = 31741476480.

The previous prime is 78354571787. The next prime is 78354571793. The reversal of 78354571792 is 29717545387.

It is a super-2 number, since 2×78354571792² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78354571793) 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, 113118 + ... + 411709.

Almost surely, 2^78354571792 is an apocalyptic number.

It is an amenable number.

78354571792 is an abundant number, since it is smaller than the sum of its proper divisors (104906968560).

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

78354571792 is a wasteful number, since it uses less digits than its factorization.

78354571792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524916 (or 524910 counting only the distinct ones).

The product of its digits is 14817600, while the sum is 58.

The spelling of 78354571792 in words is "seventy-eight billion, three hundred fifty-four million, five hundred seventy-one thousand, seven hundred ninety-two".