61157636 has 24 divisors (see below), whose sum is σ = 117232920. Its totient is φ = 27786752.

The previous prime is 61157617. The next prime is 61157639. The reversal of 61157636 is 63675116.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1960000 + 59197636 = 1400^2 + 7694^2 .

It is a super-2 number, since 2×61157636² = 7480512882216992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61157596 and 61157605.

It is not an unprimeable number, because it can be changed into a prime (61157639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13535 + ... + 17478.

It is an arithmetic number, because the mean of its divisors is an integer number (4884705).

Almost surely, 2^61157636 is an apocalyptic number.

It is an amenable number.

61157636 is a deficient number, since it is larger than the sum of its proper divisors (56075284).

61157636 is a wasteful number, since it uses less digits than its factorization.

61157636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31063 (or 31061 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 61157636 is about 7820.3347754428. The cubic root of 61157636 is about 393.9885160747.

The spelling of 61157636 in words is "sixty-one million, one hundred fifty-seven thousand, six hundred thirty-six".