91981837713190 has 32 divisors (see below), whose sum is σ = 180044576470944. Its totient is φ = 33692552317440.

The previous prime is 91981837713109. The next prime is 91981837713193. The reversal of 91981837713190 is 9131773818919.

It is a super-2 number, since 2×91981837713190² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91981837713193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7311745516 + ... + 7311758095.

It is an arithmetic number, because the mean of its divisors is an integer number (5626393014717).

Almost surely, 2^{91981837713190} is an apocalyptic number.

91981837713190 is a deficient number, since it is larger than the sum of its proper divisors (88062738757754).

91981837713190 is a wasteful number, since it uses less digits than its factorization.

91981837713190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14623503672.

The product of its (nonzero) digits is 20575296, while the sum is 67.

The spelling of 91981837713190 in words is "ninety-one trillion, nine hundred eighty-one billion, eight hundred thirty-seven million, seven hundred thirteen thousand, one hundred ninety".