61908680 has 16 divisors (see below), whose sum is σ = 139294620. Its totient is φ = 24763456.

The previous prime is 61908677. The next prime is 61908689. The reversal of 61908680 is 8680916.

It can be written as a sum of positive squares in 2 ways, for example, as 61058596 + 850084 = 7814^2 + 922^2 .

It is not an unprimeable number, because it can be changed into a prime (61908689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773819 + ... + 773898.

Almost surely, 2^61908680 is an apocalyptic number.

It is an amenable number.

61908680 is an abundant number, since it is smaller than the sum of its proper divisors (77385940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61908680 is a wasteful number, since it uses less digits than its factorization.

61908680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547728 (or 1547724 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 61908680 is about 7868.2069113617. The cubic root of 61908680 is about 395.5947457745.

The spelling of 61908680 in words is "sixty-one million, nine hundred eight thousand, six hundred eighty".