75740431421 has 4 divisors (see below), whose sum is σ = 75987143232. Its totient is φ = 75493719612.

The previous prime is 75740431397. The next prime is 75740431423. The reversal of 75740431421 is 12413404757.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12413404757 = 13 ⋅954877289.

It is a cyclic number.

It is not a de Polignac number, because 75740431421 - 2³⁰ = 74666689597 is a prime.

It is a super-2 number, since 2×75740431421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75740431423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123355445 + ... + 123356058.

It is an arithmetic number, because the mean of its divisors is an integer number (18996785808).

Almost surely, 2^75740431421 is an apocalyptic number.

It is an amenable number.

75740431421 is a deficient number, since it is larger than the sum of its proper divisors (246711811).

75740431421 is a wasteful number, since it uses less digits than its factorization.

75740431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246711810.

The product of its (nonzero) digits is 94080, while the sum is 38.

The spelling of 75740431421 in words is "seventy-five billion, seven hundred forty million, four hundred thirty-one thousand, four hundred twenty-one".