61900063878 has 8 divisors (see below), whose sum is σ = 123800127768. Its totient is φ = 20633354624.

The previous prime is 61900063871. The next prime is 61900063889. The reversal of 61900063878 is 87836000916.

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

61900063878 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61900063871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5158338651 + ... + 5158338662.

It is an arithmetic number, because the mean of its divisors is an integer number (15475015971).

Almost surely, 2^61900063878 is an apocalyptic number.

61900063878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61900063878 is a wasteful number, since it uses less digits than its factorization.

61900063878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10316677318.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 61900063878 in words is "sixty-one billion, nine hundred million, sixty-three thousand, eight hundred seventy-eight".