61899318 has 24 divisors (see below), whose sum is σ = 144432288. Its totient is φ = 19045872.

The previous prime is 61899307. The next prime is 61899337. The reversal of 61899318 is 81399816.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 132030 + ... + 132497.

It is an arithmetic number, because the mean of its divisors is an integer number (6018012).

Almost surely, 2^61899318 is an apocalyptic number.

61899318 is an abundant number, since it is smaller than the sum of its proper divisors (82532970).

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

61899318 is a wasteful number, since it uses less digits than its factorization.

61899318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264548 (or 264545 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 61899318 is about 7867.6119629783. The cubic root of 61899318 is about 395.5748037960.

The spelling of 61899318 in words is "sixty-one million, eight hundred ninety-nine thousand, three hundred eighteen".