72620777705 has 32 divisors (see below), whose sum is σ = 106312642560. Its totient is φ = 46511720640.

The previous prime is 72620777687. The next prime is 72620777717. The reversal of 72620777705 is 50777702627.

It is not a de Polignac number, because 72620777705 - 2⁶ = 72620777641 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721829 + ... + 816258.

It is an arithmetic number, because the mean of its divisors is an integer number (3322270080).

Almost surely, 2^72620777705 is an apocalyptic number.

It is an amenable number.

72620777705 is a deficient number, since it is larger than the sum of its proper divisors (33691864855).

72620777705 is a wasteful number, since it uses less digits than its factorization.

72620777705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538189.

The product of its (nonzero) digits is 2016840, while the sum is 50.

The spelling of 72620777705 in words is "seventy-two billion, six hundred twenty million, seven hundred seventy-seven thousand, seven hundred five".