61836378 has 32 divisors (see below), whose sum is σ = 131289984. Its totient is φ = 19348992.

The previous prime is 61836367. The next prime is 61836403. The reversal of 61836378 is 87363816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65526 + ... + 66462.

It is an arithmetic number, because the mean of its divisors is an integer number (4102812).

Almost surely, 2^61836378 is an apocalyptic number.

61836378 is an abundant number, since it is smaller than the sum of its proper divisors (69453606).

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

61836378 is a wasteful number, since it uses less digits than its factorization.

61836378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its digits is 145152, while the sum is 42.

The square root of 61836378 is about 7863.6110025865. The cubic root of 61836378 is about 395.4406831927.

It can be divided in two parts, 6183 and 6378, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 61836378 in words is "sixty-one million, eight hundred thirty-six thousand, three hundred seventy-eight".