91887842954240 has 44 divisors (see below), whose sum is σ = 220423142036496. Its totient is φ = 36755137179648.

The previous prime is 91887842954129. The next prime is 91887842954273. The reversal of 91887842954240 is 4245924878819.

It is a super-2 number, since 2×91887842954240² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8973417044 + ... + 8973427283.

Almost surely, 2^{91887842954240} is an apocalyptic number.

It is an amenable number.

91887842954240 is an abundant number, since it is smaller than the sum of its proper divisors (128535299082256).

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

91887842954240 is a wasteful number, since it uses less digits than its factorization.

91887842954240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17946844352 (or 17946844334 counting only the distinct ones).

The product of its (nonzero) digits is 371589120, while the sum is 71.

The spelling of 91887842954240 in words is "ninety-one trillion, eight hundred eighty-seven billion, eight hundred forty-two million, nine hundred fifty-four thousand, two hundred forty".