61939158 has 16 divisors (see below), whose sum is σ = 124825536. Its totient is φ = 20488520.

The previous prime is 61939127. The next prime is 61939181. The reversal of 61939158 is 85193916.

It is a Curzon number.

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, 38616 + ... + 40187.

It is an arithmetic number, because the mean of its divisors is an integer number (7801596).

Almost surely, 2^61939158 is an apocalyptic number.

61939158 is an abundant number, since it is smaller than the sum of its proper divisors (62886378).

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

61939158 is a wasteful number, since it uses less digits than its factorization.

61939158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78939.

The product of its digits is 58320, while the sum is 42.

The square root of 61939158 is about 7870.1434548552. The cubic root of 61939158 is about 395.6596529822.

It can be divided in two parts, 6193 and 9158, that added together give a palindrome (15351).

The spelling of 61939158 in words is "sixty-one million, nine hundred thirty-nine thousand, one hundred fifty-eight".