72661870518 has 32 divisors (see below), whose sum is σ = 150362632800. Its totient is φ = 23381116416.

The previous prime is 72661870471. The next prime is 72661870559. The reversal of 72661870518 is 81507816627.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985630 + ... + 1056782.

It is an arithmetic number, because the mean of its divisors is an integer number (4698832275).

Almost surely, 2^72661870518 is an apocalyptic number.

72661870518 is an abundant number, since it is smaller than the sum of its proper divisors (77700762282).

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

72661870518 is a wasteful number, since it uses less digits than its factorization.

72661870518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77056.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 72661870518 in words is "seventy-two billion, six hundred sixty-one million, eight hundred seventy thousand, five hundred eighteen".