61757541 has 6 divisors (see below), whose sum is σ = 89205350. Its totient is φ = 41171688.

The previous prime is 61757537. The next prime is 61757557. The reversal of 61757541 is 14575716.

61757541 is a `hidden beast` number, since 61 + 7 + 57 + 541 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59444100 + 2313441 = 7710^2 + 1521^2 .

It is not a de Polignac number, because 61757541 - 2² = 61757537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61757496 and 61757505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61757341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3430966 + ... + 3430983.

Almost surely, 2^61757541 is an apocalyptic number.

It is an amenable number.

61757541 is a deficient number, since it is larger than the sum of its proper divisors (27447809).

61757541 is a wasteful number, since it uses less digits than its factorization.

61757541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6861955 (or 6861952 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 61757541 is about 7858.5966304424. The cubic root of 61757541 is about 395.2725587740.

The spelling of 61757541 in words is "sixty-one million, seven hundred fifty-seven thousand, five hundred forty-one".