61749912 has 32 divisors (see below), whose sum is σ = 176428800. Its totient is φ = 17642784.

The previous prime is 61749901. The next prime is 61749913. The reversal of 61749912 is 21994716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61749913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183612 + ... + 183947.

It is an arithmetic number, because the mean of its divisors is an integer number (5513400).

Almost surely, 2^61749912 is an apocalyptic number.

It is an amenable number.

61749912 is an abundant number, since it is smaller than the sum of its proper divisors (114678888).

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

61749912 is a wasteful number, since it uses less digits than its factorization.

61749912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367575 (or 367571 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 61749912 is about 7858.1112234429. Note that the first 3 decimals coincide. The cubic root of 61749912 is about 395.2562819033.

The spelling of 61749912 in words is "sixty-one million, seven hundred forty-nine thousand, nine hundred twelve".