61568901 has 6 divisors (see below), whose sum is σ = 88932870. Its totient is φ = 41045928.

The previous prime is 61568879. The next prime is 61568909. The reversal of 61568901 is 10986516.

61568901 is a `hidden beast` number, since 6 + 1 + 568 + 90 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45360225 + 16208676 = 6735^2 + 4026^2 .

It is not a de Polignac number, because 61568901 - 2⁵ = 61568869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61568909) 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, 3420486 + ... + 3420503.

It is an arithmetic number, because the mean of its divisors is an integer number (14822145).

Almost surely, 2^61568901 is an apocalyptic number.

It is an amenable number.

61568901 is a deficient number, since it is larger than the sum of its proper divisors (27363969).

61568901 is a wasteful number, since it uses less digits than its factorization.

61568901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840995 (or 6840992 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 61568901 is about 7846.5853082726. The cubic root of 61568901 is about 394.8696915677.

The spelling of 61568901 in words is "sixty-one million, five hundred sixty-eight thousand, nine hundred one".