91728212760 has 96 divisors (see below), whose sum is σ = 298178702640. Its totient is φ = 24455768832.

The previous prime is 91728212731. The next prime is 91728212767. The reversal of 91728212760 is 6721282719.

It is a happy number.

It is a super-2 number, since 2×91728212760² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91728212767) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1901094 + ... + 1948746.

Almost surely, 2^91728212760 is an apocalyptic number.

91728212760 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91728212760 is an abundant number, since it is smaller than the sum of its proper divisors (206450489880).

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

91728212760 is a wasteful number, since it uses less digits than its factorization.

91728212760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53017 (or 53010 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 91728212760 in words is "ninety-one billion, seven hundred twenty-eight million, two hundred twelve thousand, seven hundred sixty".