1537861138 has 32 divisors (see below), whose sum is σ = 2559921408. Its totient is φ = 687070800.

The previous prime is 1537861109. The next prime is 1537861177. The reversal of 1537861138 is 8311687351.

It is a junction number, because it is equal to n+sod(n) for n = 1537861094 and 1537861103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305881 + ... + 310867.

It is an arithmetic number, because the mean of its divisors is an integer number (79997544).

Almost surely, 2^1537861138 is an apocalyptic number.

1537861138 is a deficient number, since it is larger than the sum of its proper divisors (1022060270).

1537861138 is a wasteful number, since it uses less digits than its factorization.

1537861138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238.

The product of its digits is 120960, while the sum is 43.

The square root of 1537861138 is about 39215.5726465903. The cubic root of 1537861138 is about 1154.2654795221.

The spelling of 1537861138 in words is "one billion, five hundred thirty-seven million, eight hundred sixty-one thousand, one hundred thirty-eight".