72660156737090 has 64 divisors (see below), whose sum is σ = 144553940175456. Its totient is φ = 26130037020672.

The previous prime is 72660156737089. The next prime is 72660156737093. The reversal of 72660156737090 is 9073765106627.

It can be written as a sum of positive squares in 16 ways, for example, as 90220334689 + 72569936402401 = 300367^2 + 8518799^2 .

It is not an unprimeable number, because it can be changed into a prime (72660156737093) 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, 37544177 + ... + 39432036.

Almost surely, 2^{72660156737090} is an apocalyptic number.

72660156737090 is a deficient number, since it is larger than the sum of its proper divisors (71893783438366).

72660156737090 is a wasteful number, since it uses less digits than its factorization.

72660156737090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76976423.

The product of its (nonzero) digits is 20003760, while the sum is 59.

The spelling of 72660156737090 in words is "seventy-two trillion, six hundred sixty billion, one hundred fifty-six million, seven hundred thirty-seven thousand, ninety".