9744121657 has 16 divisors (see below), whose sum is σ = 9942186240. Its totient is φ = 9548352000.

The previous prime is 9744121637. The next prime is 9744121697. The reversal of 9744121657 is 7561214479.

It is a cyclic number.

It is not a de Polignac number, because 9744121657 - 2²⁷ = 9609903929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9744121637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11059857 + ... + 11060737.

It is an arithmetic number, because the mean of its divisors is an integer number (621386640).

Almost surely, 2^9744121657 is an apocalyptic number.

It is an amenable number.

9744121657 is a deficient number, since it is larger than the sum of its proper divisors (198064583).

9744121657 is a wasteful number, since it uses less digits than its factorization.

9744121657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its digits is 423360, while the sum is 46.

The square root of 9744121657 is about 98712.3176559035. The cubic root of 9744121657 is about 2135.8999185838.

The spelling of 9744121657 in words is "nine billion, seven hundred forty-four million, one hundred twenty-one thousand, six hundred fifty-seven".