100561085610551 has 8 divisors (see below), whose sum is σ = 100611606295200. Its totient is φ = 100510574947200.

The previous prime is 100561085610541. The next prime is 100561085610571. The reversal of 100561085610551 is 155016580165001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100561085610551 is a prime.

It is a super-2 number, since 2×100561085610551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100561085610541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17609726 + ... + 22610276.

It is an arithmetic number, because the mean of its divisors is an integer number (12576450786900).

Almost surely, 2^{100561085610551} is an apocalyptic number.

100561085610551 is a deficient number, since it is larger than the sum of its proper divisors (50520684649).

100561085610551 is an equidigital number, since it uses as much as digits as its factorization.

100561085610551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010649.

The product of its (nonzero) digits is 180000, while the sum is 44.

The spelling of 100561085610551 in words is "one hundred trillion, five hundred sixty-one billion, eighty-five million, six hundred ten thousand, five hundred fifty-one".