38545142621 has 4 divisors (see below), whose sum is σ = 39874285500. Its totient is φ = 37215999744.

The previous prime is 38545142567. The next prime is 38545142651. The reversal of 38545142621 is 12624154583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16918204900 + 21626937721 = 130070^2 + 147061^2 .

It is not a de Polignac number, because 38545142621 - 2⁶ = 38545142557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38545142651) 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, 664571396 + ... + 664571453.

It is an arithmetic number, because the mean of its divisors is an integer number (9968571375).

Almost surely, 2^38545142621 is an apocalyptic number.

It is an amenable number.

38545142621 is a deficient number, since it is larger than the sum of its proper divisors (1329142879).

38545142621 is a wasteful number, since it uses less digits than its factorization.

38545142621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329142878.

The product of its digits is 230400, while the sum is 41.

The spelling of 38545142621 in words is "thirty-eight billion, five hundred forty-five million, one hundred forty-two thousand, six hundred twenty-one".