61102138 has 12 divisors (see below), whose sum is σ = 96732090. Its totient is φ = 28942776.

The previous prime is 61102123. The next prime is 61102141. The reversal of 61102138 is 83120116.

It can be written as a sum of positive squares in only one way, i.e., 35366809 + 25735329 = 5947^2 + 5073^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41593 + ... + 43036.

Almost surely, 2^61102138 is an apocalyptic number.

61102138 is a deficient number, since it is larger than the sum of its proper divisors (35629952).

61102138 is a wasteful number, since it uses less digits than its factorization.

61102138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84669 (or 84650 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 61102138 is about 7816.7856565215. The cubic root of 61102138 is about 393.8693039672.

The spelling of 61102138 in words is "sixty-one million, one hundred two thousand, one hundred thirty-eight".