71640501475 has 12 divisors (see below), whose sum is σ = 90510340896. Its totient is φ = 56231034080.

The previous prime is 71640501391. The next prime is 71640501497. The reversal of 71640501475 is 57410504617.

It is not a de Polignac number, because 71640501475 - 2⁷ = 71640501347 is a prime.

It is a super-2 number, since 2×71640501475² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27032827 + ... + 27035476.

It is an arithmetic number, because the mean of its divisors is an integer number (7542528408).

Almost surely, 2^71640501475 is an apocalyptic number.

71640501475 is a deficient number, since it is larger than the sum of its proper divisors (18869839421).

71640501475 is a wasteful number, since it uses less digits than its factorization.

71640501475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54068366 (or 54068361 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 71640501475 in words is "seventy-one billion, six hundred forty million, five hundred one thousand, four hundred seventy-five".