61881836 has 36 divisors (see below), whose sum is σ = 116046000. Its totient is φ = 28866816.

The previous prime is 61881821. The next prime is 61881863. The reversal of 61881836 is 63818816.

It is a junction number, because it is equal to n+sod(n) for n = 61881793 and 61881802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229910 + ... + 230178.

It is an arithmetic number, because the mean of its divisors is an integer number (3223500).

Almost surely, 2^61881836 is an apocalyptic number.

It is an amenable number.

61881836 is a deficient number, since it is larger than the sum of its proper divisors (54164164).

61881836 is a wasteful number, since it uses less digits than its factorization.

61881836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 487 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 61881836 is about 7866.5008739591. The cubic root of 61881836 is about 395.5375600369.

The spelling of 61881836 in words is "sixty-one million, eight hundred eighty-one thousand, eight hundred thirty-six".