891940592487 has 32 divisors (see below), whose sum is σ = 1404304568320. Its totient is φ = 492777250560.

The previous prime is 891940592479. The next prime is 891940592489. The reversal of 891940592487 is 784295049198.

It is not a de Polignac number, because 891940592487 - 2³ = 891940592479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891940592489) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55083 + ... + 1336755.

It is an arithmetic number, because the mean of its divisors is an integer number (43884517760).

Almost surely, 2^891940592487 is an apocalyptic number.

891940592487 is a deficient number, since it is larger than the sum of its proper divisors (512363975833).

891940592487 is a wasteful number, since it uses less digits than its factorization.

891940592487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282783.

The product of its (nonzero) digits is 52254720, while the sum is 66.

The spelling of 891940592487 in words is "eight hundred ninety-one billion, nine hundred forty million, five hundred ninety-two thousand, four hundred eighty-seven".