57345996721 has 8 divisors (see below), whose sum is σ = 61786264680. Its totient is φ = 52909876992.

The previous prime is 57345996641. The next prime is 57345996769. The reversal of 57345996721 is 12769954375.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 492840000 + 56853156721 = 22200^2 + 238439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57345996721 - 2¹⁵ = 57345963953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57345990721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008310 + ... + 1063663.

It is an arithmetic number, because the mean of its divisors is an integer number (7723283085).

Almost surely, 2^57345996721 is an apocalyptic number.

It is an amenable number.

57345996721 is a deficient number, since it is larger than the sum of its proper divisors (4440267959).

57345996721 is a wasteful number, since it uses less digits than its factorization.

57345996721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074115.

The product of its digits is 14288400, while the sum is 58.

The spelling of 57345996721 in words is "fifty-seven billion, three hundred forty-five million, nine hundred ninety-six thousand, seven hundred twenty-one".