61750121863 has 4 divisors (see below), whose sum is σ = 63879436440. Its totient is φ = 59620807288.

The previous prime is 61750121843. The next prime is 61750121879. The reversal of 61750121863 is 36812105716.

It is a happy number.

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 61750121863 - 2⁵ = 61750121831 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 (61750121843) 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, 1064657245 + ... + 1064657302.

It is an arithmetic number, because the mean of its divisors is an integer number (15969859110).

Almost surely, 2^61750121863 is an apocalyptic number.

61750121863 is a deficient number, since it is larger than the sum of its proper divisors (2129314577).

61750121863 is a wasteful number, since it uses less digits than its factorization.

61750121863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129314576.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 61750121863 in words is "sixty-one billion, seven hundred fifty million, one hundred twenty-one thousand, eight hundred sixty-three".