61136775 has 120 divisors (see below), whose sum is σ = 136836480. Its totient is φ = 26360640.

The previous prime is 61136759. The next prime is 61136791. The reversal of 61136775 is 57763116.

61136775 is a `hidden beast` number, since 611 + 36 + 7 + 7 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (61136759) and next prime (61136791).

It is not a de Polignac number, because 61136775 - 2⁴ = 61136759 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 269212 + ... + 269438.

It is an arithmetic number, because the mean of its divisors is an integer number (1140304).

Almost surely, 2^61136775 is an apocalyptic number.

61136775 is an abundant number, since it is smaller than the sum of its proper divisors (75699705).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61136775 is a wasteful number, since it uses less digits than its factorization.

61136775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 261 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 61136775 is about 7819.0008952551. Note that the first 3 decimals coincide. The cubic root of 61136775 is about 393.9437142061.

The spelling of 61136775 in words is "sixty-one million, one hundred thirty-six thousand, seven hundred seventy-five".