231402906547778 has 32 divisors (see below), whose sum is σ = 409506133969920. Its totient is φ = 95969111273280.

The previous prime is 231402906547759. The next prime is 231402906547781. The reversal of 231402906547778 is 877745609204132.

It is a super-3 number, since 3×231402906547778³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2954813 + ... + 21714896.

It is an arithmetic number, because the mean of its divisors is an integer number (12797066686560).

It is a 1-persistent number, because it is pandigital, but 2⋅231402906547778 = 462805813095556 is not.

Almost surely, 2^{231402906547778} is an apocalyptic number.

231402906547778 is a deficient number, since it is larger than the sum of its proper divisors (178103227422142).

231402906547778 is a wasteful number, since it uses less digits than its factorization.

231402906547778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24691362.

The product of its (nonzero) digits is 142248960, while the sum is 65.

The spelling of 231402906547778 in words is "two hundred thirty-one trillion, four hundred two billion, nine hundred six million, five hundred forty-seven thousand, seven hundred seventy-eight".