100661250545 has 128 divisors (see below), whose sum is σ = 139594752000. Its totient is φ = 69329433600.

The previous prime is 100661250539. The next prime is 100661250563. The reversal of 100661250545 is 545052166001.

It is not a de Polignac number, because 100661250545 - 2¹⁸ = 100660988401 is a prime.

It is a super-2 number, since 2×100661250545² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 562353266 + ... + 562353444.

It is an arithmetic number, because the mean of its divisors is an integer number (1090584000).

Almost surely, 2^100661250545 is an apocalyptic number.

It is an amenable number.

100661250545 is a deficient number, since it is larger than the sum of its proper divisors (38933501455).

100661250545 is a wasteful number, since it uses less digits than its factorization.

100661250545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 100661250545 in words is "one hundred billion, six hundred sixty-one million, two hundred fifty thousand, five hundred forty-five".