61812680 has 32 divisors (see below), whose sum is σ = 147261240. Its totient is φ = 23270400.

The previous prime is 61812679. The next prime is 61812691. The reversal of 61812680 is 8621816.

It can be written as a sum of positive squares in 4 ways, for example, as 46430596 + 15382084 = 6814^2 + 3922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44771 + ... + 46130.

Almost surely, 2^61812680 is an apocalyptic number.

It is an amenable number.

61812680 is an abundant number, since it is smaller than the sum of its proper divisors (85448560).

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

61812680 is a wasteful number, since it uses less digits than its factorization.

61812680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90929 (or 90925 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 61812680 is about 7862.1040440839. The cubic root of 61812680 is about 395.3901608789.

The spelling of 61812680 in words is "sixty-one million, eight hundred twelve thousand, six hundred eighty".