61889910063 has 4 divisors (see below), whose sum is σ = 82519880088. Its totient is φ = 41259940040.

The previous prime is 61889910001. The next prime is 61889910079. The reversal of 61889910063 is 36001998816.

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 61889910063 - 2⁹ = 61889909551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61889909988 and 61889910015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61889918063) 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, 10314985008 + ... + 10314985013.

It is an arithmetic number, because the mean of its divisors is an integer number (20629970022).

Almost surely, 2^61889910063 is an apocalyptic number.

61889910063 is a deficient number, since it is larger than the sum of its proper divisors (20629970025).

61889910063 is a wasteful number, since it uses less digits than its factorization.

61889910063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20629970024.

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 61889910063 in words is "sixty-one billion, eight hundred eighty-nine million, nine hundred ten thousand, sixty-three".