74262357588721 has 3 divisors (see below), whose sum is σ = 74262366206283. Its totient is φ = 74262348971160.

The previous prime is 74262357588677. The next prime is 74262357588799. The reversal of 74262357588721 is 12788575326247.

The square root of 74262357588721 is 8617561.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 46927445830321 + 27334911758400 = 6850361^2 + 5228280^2 .

It is not a de Polignac number, because 74262357588721 - 2⁷ = 74262357588593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74262357508721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4308781 + ... + 12926341.

It is an arithmetic number, because the mean of its divisors is an integer number (24754122068761).

Almost surely, 2^{74262357588721} is an apocalyptic number.

74262357588721 is the 8617561-st square number.

74262357588721 is the 4308781-st centered octagonal number.

It is an amenable number.

74262357588721 is a deficient number, since it is larger than the sum of its proper divisors (8617562).

74262357588721 is an frugal number, since it uses more digits than its factorization.

74262357588721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17235122 (or 8617561 counting only the distinct ones).

The product of its digits is 316108800, while the sum is 67.

The spelling of 74262357588721 in words is "seventy-four trillion, two hundred sixty-two billion, three hundred fifty-seven million, five hundred eighty-eight thousand, seven hundred twenty-one".