61306136 has 8 divisors (see below), whose sum is σ = 114949020. Its totient is φ = 30653064.

The previous prime is 61306123. The next prime is 61306153. The reversal of 61306136 is 63160316.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×61306136² = 7516884622500992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3831626 + ... + 3831641.

Almost surely, 2^61306136 is an apocalyptic number.

It is an amenable number.

61306136 is a deficient number, since it is larger than the sum of its proper divisors (53642884).

61306136 is a wasteful number, since it uses less digits than its factorization.

61306136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7663273 (or 7663269 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 61306136 is about 7829.8234973721. The cubic root of 61306136 is about 394.3071462430.

The spelling of 61306136 in words is "sixty-one million, three hundred six thousand, one hundred thirty-six".