78470442831 has 16 divisors (see below), whose sum is σ = 118074648960. Its totient is φ = 45917917920.

The previous prime is 78470442821. The next prime is 78470442839. The reversal of 78470442831 is 13824407487.

It is not a de Polignac number, because 78470442831 - 2¹⁵ = 78470410063 is a prime.

It is a super-2 number, since 2×78470442831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78470442839) 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, 40997185 + ... + 40999098.

It is an arithmetic number, because the mean of its divisors is an integer number (7379665560).

Almost surely, 2^78470442831 is an apocalyptic number.

78470442831 is a deficient number, since it is larger than the sum of its proper divisors (39604206129).

78470442831 is a wasteful number, since it uses less digits than its factorization.

78470442831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81996326.

The product of its (nonzero) digits is 1204224, while the sum is 48.

The spelling of 78470442831 in words is "seventy-eight billion, four hundred seventy million, four hundred forty-two thousand, eight hundred thirty-one".