61808976 has 180 divisors, whose sum is σ = 193464180. Its totient is φ = 18385920.

The previous prime is 61808969. The next prime is 61809023. The reversal of 61808976 is 67980816.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15023376 + 46785600 = 3876^2 + 6840^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1507516 + ... + 1507556.

It is an arithmetic number, because the mean of its divisors is an integer number (1074801).

Almost surely, 2^61808976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61808976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96732090).

61808976 is an abundant number, since it is smaller than the sum of its proper divisors (131655204).

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

61808976 is a wasteful number, since it uses less digits than its factorization.

61808976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 61808976 is about 7861.8684802024. The cubic root of 61808976 is about 395.3822630689.

The spelling of 61808976 in words is "sixty-one million, eight hundred eight thousand, nine hundred seventy-six".