61837656890 has 8 divisors (see below), whose sum is σ = 111307782420. Its totient is φ = 24735062752.

The previous prime is 61837656857. The next prime is 61837656931. The reversal of 61837656890 is 9865673816.

It can be written as a sum of positive squares in 2 ways, for example, as 61836271561 + 1385329 = 248669^2 + 1177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×61837656890³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3091882835 + ... + 3091882854.

Almost surely, 2^61837656890 is an apocalyptic number.

61837656890 is a deficient number, since it is larger than the sum of its proper divisors (49470125530).

61837656890 is a wasteful number, since it uses less digits than its factorization.

61837656890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183765696.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 61837656890 in words is "sixty-one billion, eight hundred thirty-seven million, six hundred fifty-six thousand, eight hundred ninety".