78117600125731 has 8 divisors (see below), whose sum is σ = 82512813937664. Its totient is φ = 73839592015560.

The previous prime is 78117600125723. The next prime is 78117600125737. The reversal of 78117600125731 is 13752100671187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78117600125731 - 2³ = 78117600125723 is a prime.

It is a super-2 number, since 2×78117600125731² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78117600125737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29301424071 + ... + 29301426736.

It is an arithmetic number, because the mean of its divisors is an integer number (10314101742208).

Almost surely, 2^{78117600125731} is an apocalyptic number.

78117600125731 is a deficient number, since it is larger than the sum of its proper divisors (4395213811933).

78117600125731 is a wasteful number, since it uses less digits than its factorization.

78117600125731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58602850881.

The product of its (nonzero) digits is 493920, while the sum is 49.

The spelling of 78117600125731 in words is "seventy-eight trillion, one hundred seventeen billion, six hundred million, one hundred twenty-five thousand, seven hundred thirty-one".