74124577061921 has 2 divisors, whose sum is σ = 74124577061922. Its totient is φ = 74124577061920.

The previous prime is 74124577061897. The next prime is 74124577062223. The reversal of 74124577061921 is 12916077542147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50437267686400 + 23687309375521 = 7101920^2 + 4866961^2 .

It is a cyclic number.

It is not a de Polignac number, because 74124577061921 - 2³⁴ = 74107397192737 is a prime.

It is not a weakly prime, because it can be changed into another prime (74124277061921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37062288530960 + 37062288530961.

It is an arithmetic number, because the mean of its divisors is an integer number (37062288530961).

Almost surely, 2^{74124577061921} is an apocalyptic number.

It is an amenable number.

74124577061921 is a deficient number, since it is larger than the sum of its proper divisors (1).

74124577061921 is an equidigital number, since it uses as much as digits as its factorization.

74124577061921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 74124577061921 in words is "seventy-four trillion, one hundred twenty-four billion, five hundred seventy-seven million, sixty-one thousand, nine hundred twenty-one".