78314540531 has 8 divisors (see below), whose sum is σ = 80846512128. Its totient is φ = 75782925000.

The previous prime is 78314540519. The next prime is 78314540561. The reversal of 78314540531 is 13504541387.

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 78314540531 - 2²⁶ = 78247431667 is a prime.

It is a super-2 number, since 2×78314540531² (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 (78314540501) 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, 400856 + ... + 563306.

It is an arithmetic number, because the mean of its divisors is an integer number (10105814016).

Almost surely, 2^78314540531 is an apocalyptic number.

78314540531 is a deficient number, since it is larger than the sum of its proper divisors (2531971597).

78314540531 is a wasteful number, since it uses less digits than its factorization.

78314540531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178033.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 78314540531 in words is "seventy-eight billion, three hundred fourteen million, five hundred forty thousand, five hundred thirty-one".