100505561051 has 6 divisors (see below), whose sum is σ = 116914632300. Its totient is φ = 86147623716.

The previous prime is 100505561041. The next prime is 100505561081. The reversal of 100505561051 is 150165505001.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-100505561051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100505561041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1025566901 + ... + 1025566998.

It is an arithmetic number, because the mean of its divisors is an integer number (19485772050).

Almost surely, 2^100505561051 is an apocalyptic number.

100505561051 is a deficient number, since it is larger than the sum of its proper divisors (16409071249).

100505561051 is an equidigital number, since it uses as much as digits as its factorization.

100505561051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051133913 (or 2051133906 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 100505561051 in words is "one hundred billion, five hundred five million, five hundred sixty-one thousand, fifty-one".