61261768 has 8 divisors (see below), whose sum is σ = 114865830. Its totient is φ = 30630880.

The previous prime is 61261763. The next prime is 61261769. The reversal of 61261768 is 86716216.

It can be written as a sum of positive squares in only one way, i.e., 60559524 + 702244 = 7782^2 + 838^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61261763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3828853 + ... + 3828868.

Almost surely, 2^61261768 is an apocalyptic number.

It is an amenable number.

61261768 is a deficient number, since it is larger than the sum of its proper divisors (53604062).

61261768 is a wasteful number, since it uses less digits than its factorization.

61261768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7657727 (or 7657723 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 61261768 is about 7826.9897150820. The cubic root of 61261768 is about 394.2120016530.

The spelling of 61261768 in words is "sixty-one million, two hundred sixty-one thousand, seven hundred sixty-eight".