91612645005408 has 96 divisors (see below), whose sum is σ = 250943050584576. Its totient is φ = 29209355501568.

The previous prime is 91612645005373. The next prime is 91612645005433. The reversal of 91612645005408 is 80450054621619.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151469485 + ... + 152073107.

It is an arithmetic number, because the mean of its divisors is an integer number (2613990110256).

Almost surely, 2^{91612645005408} is an apocalyptic number.

It is an amenable number.

91612645005408 is an abundant number, since it is smaller than the sum of its proper divisors (159330405579168).

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

91612645005408 is a wasteful number, since it uses less digits than its factorization.

91612645005408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672396 (or 672388 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 91612645005408 in words is "ninety-one trillion, six hundred twelve billion, six hundred forty-five million, five thousand, four hundred eight".