61051050500 has 192 divisors, whose sum is σ = 152246255616. Its totient is φ = 21170160000.

The previous prime is 61051050499. The next prime is 61051050509. The reversal of 61051050500 is 505015016.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (61051050509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61605005 + ... + 61605995.

It is an arithmetic number, because the mean of its divisors is an integer number (792949248).

Almost surely, 2^61051050500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61051050500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76123127808).

61051050500 is an abundant number, since it is smaller than the sum of its proper divisors (91195205116).

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

61051050500 is a wasteful number, since it uses less digits than its factorization.

61051050500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1519 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 61051050500 its reverse (505015016), we get a palindrome (61556065516).

The spelling of 61051050500 in words is "sixty-one billion, fifty-one million, fifty thousand, five hundred".