100561001615 has 16 divisors (see below), whose sum is σ = 121900891680. Its totient is φ = 79631575680.

The previous prime is 100561001543. The next prime is 100561001621. The reversal of 100561001615 is 516100165001.

It is not a de Polignac number, because 100561001615 - 2¹⁶ = 100560936079 is a prime.

It is a super-2 number, since 2×100561001615² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581045 + ... + 733985.

It is an arithmetic number, because the mean of its divisors is an integer number (7618805730).

Almost surely, 2^100561001615 is an apocalyptic number.

100561001615 is a deficient number, since it is larger than the sum of its proper divisors (21339890065).

100561001615 is a wasteful number, since it uses less digits than its factorization.

100561001615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154282.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 100561001615 its reverse (516100165001), we get a palindrome (616661166616).

The spelling of 100561001615 in words is "one hundred billion, five hundred sixty-one million, one thousand, six hundred fifteen".