61939156 has 24 divisors (see below), whose sum is σ = 111348776. Its totient is φ = 30136320.

The previous prime is 61939127. The next prime is 61939181. The reversal of 61939156 is 65193916.

It can be written as a sum of positive squares in 4 ways, for example, as 8503056 + 53436100 = 2916^2 + 7310^2 .

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, 22360 + ... + 24976.

Almost surely, 2^61939156 is an apocalyptic number.

It is an amenable number.

61939156 is a deficient number, since it is larger than the sum of its proper divisors (49409620).

61939156 is a wasteful number, since it uses less digits than its factorization.

61939156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779 (or 2777 counting only the distinct ones).

The product of its digits is 43740, while the sum is 40.

The square root of 61939156 is about 7870.1433277927. The cubic root of 61939156 is about 395.6596487236.

The spelling of 61939156 in words is "sixty-one million, nine hundred thirty-nine thousand, one hundred fifty-six".