72081551707 has 32 divisors (see below), whose sum is σ = 84526364160. Its totient is φ = 60807648000.

The previous prime is 72081551699. The next prime is 72081551719. The reversal of 72081551707 is 70715518027.

It is not a de Polignac number, because 72081551707 - 2³ = 72081551699 is a prime.

It is a super-2 number, since 2×72081551707² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72081551107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1837357 + ... + 1876177.

It is an arithmetic number, because the mean of its divisors is an integer number (2641448880).

Almost surely, 2^72081551707 is an apocalyptic number.

72081551707 is a deficient number, since it is larger than the sum of its proper divisors (12444812453).

72081551707 is a wasteful number, since it uses less digits than its factorization.

72081551707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39075.

The product of its (nonzero) digits is 137200, while the sum is 43.

The spelling of 72081551707 in words is "seventy-two billion, eighty-one million, five hundred fifty-one thousand, seven hundred seven".