72512721077070 has 64 divisors (see below), whose sum is σ = 180606764819520. Its totient is φ = 18610293531648.

The previous prime is 72512721077029. The next prime is 72512721077113. The reversal of 72512721077070 is 7077012721527.

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 31 ways as a sum of consecutive naturals, for example, 132871389 + ... + 133416008.

It is an arithmetic number, because the mean of its divisors is an integer number (2821980700305).

Almost surely, 2^{72512721077070} is an apocalyptic number.

72512721077070 is an abundant number, since it is smaller than the sum of its proper divisors (108094043742450).

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

72512721077070 is a wasteful number, since it uses less digits than its factorization.

72512721077070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266287749.

The product of its (nonzero) digits is 672280, while the sum is 48.

Adding to 72512721077070 its reverse (7077012721527), we get a palindrome (79589733798597).

The spelling of 72512721077070 in words is "seventy-two trillion, five hundred twelve billion, seven hundred twenty-one million, seventy-seven thousand, seventy".