9400901755921 has 27 divisors (see below), whose sum is σ = 10234567008891. Its totient is φ = 8631212235984.

The previous prime is 9400901755909. The next prime is 9400901755979. The reversal of 9400901755921 is 1295571090049.

The square root of 9400901755921 is 3066089.

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

It can be written as a sum of positive squares in only one way, i.e., 1390665940225 + 8010235815696 = 1179265^2 + 2830236^2 .

It is not a de Polignac number, because 9400901755921 - 2⁴³ = 604808733713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9400901755121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9048028120 + ... + 9048029158.

Almost surely, 2^{9400901755921} is an apocalyptic number.

9400901755921 is the 3066089-th square number.

9400901755921 is the 1533045-th centered octagonal number.

It is an amenable number.

9400901755921 is a deficient number, since it is larger than the sum of its proper divisors (833665252970).

9400901755921 is an frugal number, since it uses more digits than its factorization.

9400901755921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 52.

The spelling of 9400901755921 in words is "nine trillion, four hundred billion, nine hundred one million, seven hundred fifty-five thousand, nine hundred twenty-one".