72406670571640 has 16 divisors (see below), whose sum is σ = 162915008786280. Its totient is φ = 28962668228640.

The previous prime is 72406670571583. The next prime is 72406670571661. The reversal of 72406670571640 is 4617507660427.

It is a congruent number.

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, 905083382106 + ... + 905083382185.

Almost surely, 2^{72406670571640} is an apocalyptic number.

It is an amenable number.

72406670571640 is an abundant number, since it is smaller than the sum of its proper divisors (90508338214640).

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

72406670571640 is a wasteful number, since it uses less digits than its factorization.

72406670571640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810166764302 (or 1810166764298 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 55.

The spelling of 72406670571640 in words is "seventy-two trillion, four hundred six billion, six hundred seventy million, five hundred seventy-one thousand, six hundred forty".