740737356921 has 15 divisors (see below), whose sum is σ = 1106545153791. Its totient is φ = 493819740648.

The previous prime is 740737356911. The next prime is 740737356941. The reversal of 740737356921 is 129653737047.

The square root of 740737356921 is 860661.

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

740737356921 is a `hidden beast` number, since 7 + 4 + 0 + 7 + 3 + 73 + 569 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4470393321 + 736266963600 = 66861^2 + 858060^2 .

It is not a de Polignac number, because 740737356921 - 2²⁷ = 740603139193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (740737356911) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 7698135 + ... + 7793763.

Almost surely, 2^740737356921 is an apocalyptic number.

740737356921 is the 860661-st square number.

740737356921 is the 430331-st centered octagonal number.

It is an amenable number.

740737356921 is a deficient number, since it is larger than the sum of its proper divisors (365807796870).

740737356921 is an frugal number, since it uses more digits than its factorization.

740737356921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191270 (or 95632 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 54.

The spelling of 740737356921 in words is "seven hundred forty billion, seven hundred thirty-seven million, three hundred fifty-six thousand, nine hundred twenty-one".