61145900 has 18 divisors (see below), whose sum is σ = 132686820. Its totient is φ = 24458320.

The previous prime is 61145897. The next prime is 61145939. The reversal of 61145900 is 954116.

It is a self number, because there is not a number n which added to its sum of digits gives 61145900.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 305630 + ... + 305829.

It is an arithmetic number, because the mean of its divisors is an integer number (7371490).

Almost surely, 2^61145900 is an apocalyptic number.

It is an amenable number.

61145900 is an abundant number, since it is smaller than the sum of its proper divisors (71540920).

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

61145900 is a wasteful number, since it uses less digits than its factorization.

61145900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611473 (or 611466 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61145900 is about 7819.5843879326. The cubic root of 61145900 is about 393.9633126533.

The spelling of 61145900 in words is "sixty-one million, one hundred forty-five thousand, nine hundred".