91397000842 has 64 divisors (see below), whose sum is σ = 162222912000. Its totient is φ = 37810805760.

The previous prime is 91397000809. The next prime is 91397000843. The reversal of 91397000842 is 24800079319.

It is not an unprimeable number, because it can be changed into a prime (91397000843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29974534 + ... + 29977582.

It is an arithmetic number, because the mean of its divisors is an integer number (2534733000).

Almost surely, 2^91397000842 is an apocalyptic number.

91397000842 is a deficient number, since it is larger than the sum of its proper divisors (70825911158).

91397000842 is a wasteful number, since it uses less digits than its factorization.

91397000842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 91397000842 in words is "ninety-one billion, three hundred ninety-seven million, eight hundred forty-two", and thus it is an aban number.