72457152077 has 4 divisors (see below), whose sum is σ = 73538602176. Its totient is φ = 71375701980.

The previous prime is 72457152073. The next prime is 72457152091. The reversal of 72457152077 is 77025175427.

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 72457152077 - 2² = 72457152073 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 (72457152073) 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, 540724949 + ... + 540725082.

It is an arithmetic number, because the mean of its divisors is an integer number (18384650544).

Almost surely, 2^72457152077 is an apocalyptic number.

It is an amenable number.

72457152077 is a deficient number, since it is larger than the sum of its proper divisors (1081450099).

72457152077 is a wasteful number, since it uses less digits than its factorization.

72457152077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081450098.

The product of its (nonzero) digits is 960400, while the sum is 47.

The spelling of 72457152077 in words is "seventy-two billion, four hundred fifty-seven million, one hundred fifty-two thousand, seventy-seven".