61918461938 has 8 divisors (see below), whose sum is σ = 92878880688. Its totient is φ = 30958835044.

The previous prime is 61918461931. The next prime is 61918461947. The reversal of 61918461938 is 83916481916.

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

It is not an unprimeable number, because it can be changed into a prime (61918461931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70145 + ... + 358827.

It is an arithmetic number, because the mean of its divisors is an integer number (11609860086).

Almost surely, 2^61918461938 is an apocalyptic number.

61918461938 is a deficient number, since it is larger than the sum of its proper divisors (30960418750).

61918461938 is a wasteful number, since it uses less digits than its factorization.

61918461938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395928.

The product of its digits is 2239488, while the sum is 56.

The spelling of 61918461938 in words is "sixty-one billion, nine hundred eighteen million, four hundred sixty-one thousand, nine hundred thirty-eight".