61535457 has 10 divisors (see below), whose sum is σ = 91923458. Its totient is φ = 41023584.

The previous prime is 61535447. The next prime is 61535479. The reversal of 61535457 is 75453516.

61535457 is a `hidden beast` number, since 61 + 53 + 545 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 37564641 + 23970816 = 6129^2 + 4896^2 .

It is not a de Polignac number, because 61535457 - 2¹⁵ = 61502689 is a prime.

It is a super-2 number, since 2×61535457² = 7573224936397698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61535417) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 379768 + ... + 379929.

Almost surely, 2^61535457 is an apocalyptic number.

It is an amenable number.

61535457 is a deficient number, since it is larger than the sum of its proper divisors (30388001).

61535457 is an equidigital number, since it uses as much as digits as its factorization.

61535457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759709 (or 759700 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 61535457 is about 7844.4539006868. The cubic root of 61535457 is about 394.7981813647.

The spelling of 61535457 in words is "sixty-one million, five hundred thirty-five thousand, four hundred fifty-seven".