100405520145 has 24 divisors (see below), whose sum is σ = 198898554816. Its totient is φ = 45899666208.

The previous prime is 100405520119. The next prime is 100405520167. The reversal of 100405520145 is 541025504001.

100405520145 is a `hidden beast` number, since 10 + 0 + 405 + 5 + 201 + 45 = 666.

It is not a de Polignac number, because 100405520145 - 2⁶ = 100405520081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159373527 + ... + 159374156.

It is an arithmetic number, because the mean of its divisors is an integer number (8287439784).

Almost surely, 2^100405520145 is an apocalyptic number.

100405520145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100405520145 is a deficient number, since it is larger than the sum of its proper divisors (98493034671).

100405520145 is a wasteful number, since it uses less digits than its factorization.

100405520145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318747701 (or 318747698 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 100405520145 in words is "one hundred billion, four hundred five million, five hundred twenty thousand, one hundred forty-five".