72076510570769 has 4 divisors (see below), whose sum is σ = 76316305310244. Its totient is φ = 67836715831296.

The previous prime is 72076510570741. The next prime is 72076510570781. The reversal of 72076510570769 is 96707501567027.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61432362894400 + 10644147676369 = 7837880^2 + 3262537^2 .

It is a cyclic number.

It is not a de Polignac number, because 72076510570769 - 2⁸ = 72076510570513 is a prime.

It is a super-3 number, since 3×72076510570769³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72076510570069) 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, 2119897369712 + ... + 2119897369745.

It is an arithmetic number, because the mean of its divisors is an integer number (19079076327561).

Almost surely, 2^{72076510570769} is an apocalyptic number.

It is an amenable number.

72076510570769 is a deficient number, since it is larger than the sum of its proper divisors (4239794739475).

72076510570769 is a wasteful number, since it uses less digits than its factorization.

72076510570769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239794739474.

The product of its (nonzero) digits is 38896200, while the sum is 62.

The spelling of 72076510570769 in words is "seventy-two trillion, seventy-six billion, five hundred ten million, five hundred seventy thousand, seven hundred sixty-nine".