91687273500 has 48 divisors (see below), whose sum is σ = 266993344800. Its totient is φ = 24449939200.

The previous prime is 91687273499. The next prime is 91687273501. The reversal of 91687273500 is 537278619.

It is an interprime number because it is at equal distance from previous prime (91687273499) and next prime (91687273501).

It is a super-2 number, since 2×91687273500² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91687273500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91687273501) 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, 30560925 + ... + 30563924.

It is an arithmetic number, because the mean of its divisors is an integer number (5562361350).

Almost surely, 2^91687273500 is an apocalyptic number.

It is an amenable number.

91687273500 is an abundant number, since it is smaller than the sum of its proper divisors (175306071300).

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

91687273500 is a wasteful number, since it uses less digits than its factorization.

91687273500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61124871 (or 61124859 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 91687273500 in words is "ninety-one billion, six hundred eighty-seven million, two hundred seventy-three thousand, five hundred".