61545712 has 40 divisors (see below), whose sum is σ = 132915600. Its totient is φ = 27436032.

The previous prime is 61545709. The next prime is 61545721. The reversal of 61545712 is 21754516.

It is a congruent number.

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, 787 + ... + 11122.

It is an arithmetic number, because the mean of its divisors is an integer number (3322890).

Almost surely, 2^61545712 is an apocalyptic number.

It is an amenable number.

61545712 is an abundant number, since it is smaller than the sum of its proper divisors (71369888).

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

61545712 is a wasteful number, since it uses less digits than its factorization.

61545712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11953 (or 11947 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 61545712 is about 7845.1075199770. The cubic root of 61545712 is about 394.8201114337.

The spelling of 61545712 in words is "sixty-one million, five hundred forty-five thousand, seven hundred twelve".