61687450 has 48 divisors (see below), whose sum is σ = 127357920. Its totient is φ = 22040000.

The previous prime is 61687447. The next prime is 61687469. The reversal of 61687450 is 5478616.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31500 + ... + 33400.

It is an arithmetic number, because the mean of its divisors is an integer number (2653290).

Almost surely, 2^61687450 is an apocalyptic number.

61687450 is an abundant number, since it is smaller than the sum of its proper divisors (65670470).

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

61687450 is a wasteful number, since it uses less digits than its factorization.

61687450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 61687450 is about 7854.1358531668. The cubic root of 61687450 is about 395.1229655084.

The spelling of 61687450 in words is "sixty-one million, six hundred eighty-seven thousand, four hundred fifty".