40597890891 has 16 divisors (see below), whose sum is σ = 54415244064. Its totient is φ = 26923221504.

The previous prime is 40597890889. The next prime is 40597890929. The reversal of 40597890891 is 19809879504.

It is not a de Polignac number, because 40597890891 - 2¹ = 40597890889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40597891891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469555 + ... + 549251.

It is an arithmetic number, because the mean of its divisors is an integer number (3400952754).

Almost surely, 2^40597890891 is an apocalyptic number.

40597890891 is a deficient number, since it is larger than the sum of its proper divisors (13817353173).

40597890891 is a wasteful number, since it uses less digits than its factorization.

40597890891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80590.

The product of its (nonzero) digits is 6531840, while the sum is 60.

The spelling of 40597890891 in words is "forty billion, five hundred ninety-seven million, eight hundred ninety thousand, eight hundred ninety-one".