54139437538 has 4 divisors (see below), whose sum is σ = 81209156310. Its totient is φ = 27069718768.

The previous prime is 54139437511. The next prime is 54139437551. The reversal of 54139437538 is 83573493145.

54139437538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 54136724929 + 2712609 = 232673^2 + 1647^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13534859383 + ... + 13534859386.

Almost surely, 2^54139437538 is an apocalyptic number.

54139437538 is a deficient number, since it is larger than the sum of its proper divisors (27069718772).

54139437538 is a wasteful number, since it uses less digits than its factorization.

54139437538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27069718771.

The product of its digits is 5443200, while the sum is 52.

The spelling of 54139437538 in words is "fifty-four billion, one hundred thirty-nine million, four hundred thirty-seven thousand, five hundred thirty-eight".