91647147900 has 1152 divisors, whose sum is σ = 375815946240. Its totient is φ = 16644096000.

The previous prime is 91647147887. The next prime is 91647147901. The reversal of 91647147900 is 974174619.

It is a self number, because there is not a number n which added to its sum of digits gives 91647147900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91647147901) by changing a digit.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 529752214 + ... + 529752386.

It is an arithmetic number, because the mean of its divisors is an integer number (326229120).

Almost surely, 2^91647147900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91647147900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187907973120).

91647147900 is an abundant number, since it is smaller than the sum of its proper divisors (284168798340).

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

91647147900 is a wasteful number, since it uses less digits than its factorization.

91647147900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 91647147900 in words is "ninety-one billion, six hundred forty-seven million, one hundred forty-seven thousand, nine hundred".