4657929387721 has 4 divisors (see below), whose sum is σ = 4818547642500. Its totient is φ = 4497311132944.

The previous prime is 4657929387689. The next prime is 4657929387737. The reversal of 4657929387721 is 1277839297564.

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 3262589637696 + 1395339750025 = 1806264^2 + 1181245^2 .

It is a cyclic number.

It is not a de Polignac number, because 4657929387721 - 2⁵ = 4657929387689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4657929387781) 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, 80309127346 + ... + 80309127403.

It is an arithmetic number, because the mean of its divisors is an integer number (1204636910625).

Almost surely, 2^{4657929387721} is an apocalyptic number.

It is an amenable number.

4657929387721 is a deficient number, since it is larger than the sum of its proper divisors (160618254779).

4657929387721 is a wasteful number, since it uses less digits than its factorization.

4657929387721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160618254778.

The product of its digits is 320060160, while the sum is 70.

The spelling of 4657929387721 in words is "four trillion, six hundred fifty-seven billion, nine hundred twenty-nine million, three hundred eighty-seven thousand, seven hundred twenty-one".