75465726421 has 2 divisors, whose sum is σ = 75465726422. Its totient is φ = 75465726420.

The previous prime is 75465726319. The next prime is 75465726433. The reversal of 75465726421 is 12462756457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66247038225 + 9218688196 = 257385^2 + 96014^2 .

It is a cyclic number.

It is not a de Polignac number, because 75465726421 - 2²⁵ = 75432171989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75465726481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37732863210 + 37732863211.

It is an arithmetic number, because the mean of its divisors is an integer number (37732863211).

Almost surely, 2^75465726421 is an apocalyptic number.

It is an amenable number.

75465726421 is a deficient number, since it is larger than the sum of its proper divisors (1).

75465726421 is an equidigital number, since it uses as much as digits as its factorization.

75465726421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 49.

The spelling of 75465726421 in words is "seventy-five billion, four hundred sixty-five million, seven hundred twenty-six thousand, four hundred twenty-one".