61687360 has 56 divisors (see below), whose sum is σ = 167883840. Its totient is φ = 21149184.

The previous prime is 61687331. The next prime is 61687363. The reversal of 61687360 is 6378616.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (61687363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11530 + ... + 16009.

Almost surely, 2^61687360 is an apocalyptic number.

It is an amenable number.

61687360 is an abundant number, since it is smaller than the sum of its proper divisors (106196480).

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

61687360 is a wasteful number, since it uses less digits than its factorization.

61687360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27563 (or 27553 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 61687360 is about 7854.1301236993. The cubic root of 61687360 is about 395.1227733511.

The spelling of 61687360 in words is "sixty-one million, six hundred eighty-seven thousand, three hundred sixty".