72696397757 has 4 divisors (see below), whose sum is σ = 73131705696. Its totient is φ = 72261089820.

The previous prime is 72696397751. The next prime is 72696397769. The reversal of 72696397757 is 75779369627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72696397757 - 2⁶ = 72696397693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72696397751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217653719 + ... + 217654052.

It is an arithmetic number, because the mean of its divisors is an integer number (18282926424).

Almost surely, 2^72696397757 is an apocalyptic number.

It is an amenable number.

72696397757 is a deficient number, since it is larger than the sum of its proper divisors (435307939).

72696397757 is a wasteful number, since it uses less digits than its factorization.

72696397757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435307938.

The product of its digits is 210039480, while the sum is 68.

The spelling of 72696397757 in words is "seventy-two billion, six hundred ninety-six million, three hundred ninety-seven thousand, seven hundred fifty-seven".