61900063879 has 4 divisors (see below), whose sum is σ = 61960691800. Its totient is φ = 61839435960.

The previous prime is 61900063871. The next prime is 61900063889. The reversal of 61900063879 is 97836000916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61900063879 - 2³ = 61900063871 is a prime.

It is a Duffinian 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30312429 + ... + 30314470.

It is an arithmetic number, because the mean of its divisors is an integer number (15490172950).

Almost surely, 2^61900063879 is an apocalyptic number.

61900063879 is a deficient number, since it is larger than the sum of its proper divisors (60627921).

61900063879 is a wasteful number, since it uses less digits than its factorization.

61900063879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60627920.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 61900063879 in words is "sixty-one billion, nine hundred million, sixty-three thousand, eight hundred seventy-nine".