5121656401 has 4 divisors (see below), whose sum is σ = 5144218992. Its totient is φ = 5099093812.

The previous prime is 5121656377. The next prime is 5121656437. The reversal of 5121656401 is 1046561215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5121656401 - 2¹¹ = 5121654353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5121656461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11280955 + ... + 11281408.

It is an arithmetic number, because the mean of its divisors is an integer number (1286054748).

Almost surely, 2^5121656401 is an apocalyptic number.

It is an amenable number.

5121656401 is a deficient number, since it is larger than the sum of its proper divisors (22562591).

5121656401 is a wasteful number, since it uses less digits than its factorization.

5121656401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22562590.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 5121656401 is about 71565.7487978712. The cubic root of 5121656401 is about 1723.7335969740.

The spelling of 5121656401 in words is "five billion, one hundred twenty-one million, six hundred fifty-six thousand, four hundred one".