74927638933421 has 2 divisors, whose sum is σ = 74927638933422. Its totient is φ = 74927638933420.

The previous prime is 74927638933417. The next prime is 74927638933439. The reversal of 74927638933421 is 12433983672947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51916564249225 + 23011074684196 = 7205315^2 + 4796986^2 .

It is a cyclic number.

It is not a de Polignac number, because 74927638933421 - 2² = 74927638933417 is a prime.

It is a super-2 number, since 2×74927638933421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74927638933471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37463819466710 + 37463819466711.

It is an arithmetic number, because the mean of its divisors is an integer number (37463819466711).

Almost surely, 2^{74927638933421} is an apocalyptic number.

It is an amenable number.

74927638933421 is a deficient number, since it is larger than the sum of its proper divisors (1).

74927638933421 is an equidigital number, since it uses as much as digits as its factorization.

74927638933421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329204736, while the sum is 68.

The spelling of 74927638933421 in words is "seventy-four trillion, nine hundred twenty-seven billion, six hundred thirty-eight million, nine hundred thirty-three thousand, four hundred twenty-one".