61839156 has 24 divisors (see below), whose sum is σ = 144682720. Its totient is φ = 20557152.

The previous prime is 61839143. The next prime is 61839161. The reversal of 61839156 is 65193816.

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, 2251 + ... + 11346.

Almost surely, 2^61839156 is an apocalyptic number.

It is an amenable number.

61839156 is an abundant number, since it is smaller than the sum of its proper divisors (82843564).

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

61839156 is a wasteful number, since it uses less digits than its factorization.

61839156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13983 (or 13981 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 61839156 is about 7863.7876370106. The cubic root of 61839156 is about 395.4466048298.

The spelling of 61839156 in words is "sixty-one million, eight hundred thirty-nine thousand, one hundred fifty-six".