72070521505 has 32 divisors (see below), whose sum is σ = 91157425920. Its totient is φ = 54592876800.

The previous prime is 72070521491. The next prime is 72070521511. The reversal of 72070521505 is 50512507027.

It is not a de Polignac number, because 72070521505 - 2⁹ = 72070520993 is a prime.

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, 18712830 + ... + 18716680.

It is an arithmetic number, because the mean of its divisors is an integer number (2848669560).

Almost surely, 2^72070521505 is an apocalyptic number.

It is an amenable number.

72070521505 is a deficient number, since it is larger than the sum of its proper divisors (19086904415).

72070521505 is a wasteful number, since it uses less digits than its factorization.

72070521505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5481.

The product of its (nonzero) digits is 24500, while the sum is 34.

The spelling of 72070521505 in words is "seventy-two billion, seventy million, five hundred twenty-one thousand, five hundred five".