74643615121 has 16 divisors (see below), whose sum is σ = 76284835200. Its totient is φ = 73015689600.

The previous prime is 74643615119. The next prime is 74643615131. The reversal of 74643615121 is 12151634647.

It is a cyclic number.

It is not a de Polignac number, because 74643615121 - 2¹ = 74643615119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74643615131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13741276 + ... + 13746706.

It is an arithmetic number, because the mean of its divisors is an integer number (4767802200).

Almost surely, 2^74643615121 is an apocalyptic number.

It is an amenable number.

74643615121 is a deficient number, since it is larger than the sum of its proper divisors (1641220079).

74643615121 is a wasteful number, since it uses less digits than its factorization.

74643615121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600.

The product of its digits is 120960, while the sum is 40.

The spelling of 74643615121 in words is "seventy-four billion, six hundred forty-three million, six hundred fifteen thousand, one hundred twenty-one".