78043325531 has 8 divisors (see below), whose sum is σ = 82338009600. Its totient is φ = 73767355560.

The previous prime is 78043325527. The next prime is 78043325533. The reversal of 78043325531 is 13552334087.

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 78043325531 - 2² = 78043325527 is a prime.

It is a super-2 number, since 2×78043325531² (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 (78043325533) 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, 4669955 + ... + 4686636.

It is an arithmetic number, because the mean of its divisors is an integer number (10292251200).

Almost surely, 2^78043325531 is an apocalyptic number.

78043325531 is a deficient number, since it is larger than the sum of its proper divisors (4294684069).

78043325531 is a wasteful number, since it uses less digits than its factorization.

78043325531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9357049.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 78043325531 in words is "seventy-eight billion, forty-three million, three hundred twenty-five thousand, five hundred thirty-one".