37744129421 has 4 divisors (see below), whose sum is σ = 37747452000. Its totient is φ = 37740806844.

The previous prime is 37744129399. The next prime is 37744129433. The reversal of 37744129421 is 12492144773.

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: 12492144773 = 547 ⋅22837559.

It is a cyclic number.

It is not a de Polignac number, because 37744129421 - 2³⁰ = 36670387597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37744129441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644191 + ... + 1666988.

It is an arithmetic number, because the mean of its divisors is an integer number (9436863000).

Almost surely, 2^37744129421 is an apocalyptic number.

It is an amenable number.

37744129421 is a deficient number, since it is larger than the sum of its proper divisors (3322579).

37744129421 is a wasteful number, since it uses less digits than its factorization.

37744129421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322578.

The product of its digits is 338688, while the sum is 44.

The spelling of 37744129421 in words is "thirty-seven billion, seven hundred forty-four million, one hundred twenty-nine thousand, four hundred twenty-one".