85951509438 has 32 divisors (see below), whose sum is σ = 172413142272. Its totient is φ = 28565576000.

The previous prime is 85951509409. The next prime is 85951509463. The reversal of 85951509438 is 83490515958.

It is a happy number.

It is a congruent number.

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, 4005538 + ... + 4026938.

It is an arithmetic number, because the mean of its divisors is an integer number (5387910696).

Almost surely, 2^85951509438 is an apocalyptic number.

85951509438 is an abundant number, since it is smaller than the sum of its proper divisors (86461632834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85951509438 is a wasteful number, since it uses less digits than its factorization.

85951509438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23360.

The product of its (nonzero) digits is 7776000, while the sum is 57.

The spelling of 85951509438 in words is "eighty-five billion, nine hundred fifty-one million, five hundred nine thousand, four hundred thirty-eight".