72957099601 has 4 divisors (see below), whose sum is σ = 73626430900. Its totient is φ = 72287768304.

The previous prime is 72957099599. The next prime is 72957099613. The reversal of 72957099601 is 10699075927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10699075927 = 20897 ⋅511991.

It can be written as a sum of positive squares in 2 ways, for example, as 37612723600 + 35344376001 = 193940^2 + 188001^2 .

It is a cyclic number.

It is not a de Polignac number, because 72957099601 - 2¹ = 72957099599 is a prime.

It is a super-3 number, since 3×72957099601³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72957099641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334665486 + ... + 334665703.

It is an arithmetic number, because the mean of its divisors is an integer number (18406607725).

Almost surely, 2^72957099601 is an apocalyptic number.

It is an amenable number.

72957099601 is a deficient number, since it is larger than the sum of its proper divisors (669331299).

72957099601 is a wasteful number, since it uses less digits than its factorization.

72957099601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669331298.

The product of its (nonzero) digits is 2143260, while the sum is 55.

The spelling of 72957099601 in words is "seventy-two billion, nine hundred fifty-seven million, ninety-nine thousand, six hundred one".