78470854731 has 16 divisors (see below), whose sum is σ = 116280495520. Its totient is φ = 52301583360.

The previous prime is 78470854643. The next prime is 78470854769. The reversal of 78470854731 is 13745807487.

It is not a de Polignac number, because 78470854731 - 2¹⁷ = 78470723659 is a prime.

It is a super-2 number, since 2×78470854731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78470853731) 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, 224710 + ... + 455451.

It is an arithmetic number, because the mean of its divisors is an integer number (7267530970).

Almost surely, 2^78470854731 is an apocalyptic number.

78470854731 is a deficient number, since it is larger than the sum of its proper divisors (37809640789).

78470854731 is a wasteful number, since it uses less digits than its factorization.

78470854731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684443 (or 684437 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 54.

The spelling of 78470854731 in words is "seventy-eight billion, four hundred seventy million, eight hundred fifty-four thousand, seven hundred thirty-one".