48801669921 has 9 divisors (see below), whose sum is σ = 70492258291. Its totient is φ = 32534004792.

The previous prime is 48801669907. The next prime is 48801669923. The reversal of 48801669921 is 12996610884.

The square root of 48801669921 is 220911.

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

48801669921 is a `hidden beast` number, since 488 + 0 + 16 + 69 + 92 + 1 = 666.

48801669921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 48283470225 + 518199696 = 219735^2 + 22764^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 48801669921 - 2²⁷ = 48667452193 is a prime.

It is a super-2 number, since 2×48801669921² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48801669923) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 625915 + ... + 699551.

Almost surely, 2^48801669921 is an apocalyptic number.

48801669921 is the 220911-st square number.

48801669921 is the 110456-th centered octagonal number.

It is an amenable number.

48801669921 is a deficient number, since it is larger than the sum of its proper divisors (21690588370).

48801669921 is an frugal number, since it uses more digits than its factorization.

48801669921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147280 (or 73640 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 48801669921 in words is "forty-eight billion, eight hundred one million, six hundred sixty-nine thousand, nine hundred twenty-one".