120409491905 has 16 divisors (see below), whose sum is σ = 149489392320. Its totient is φ = 92996283072.

The previous prime is 120409491869. The next prime is 120409491919. The reversal of 120409491905 is 509194904021.

It is a cyclic number.

It is not a de Polignac number, because 120409491905 - 2²² = 120405297601 is a prime.

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, 1561262 + ... + 1636568.

It is an arithmetic number, because the mean of its divisors is an integer number (9343087020).

Almost surely, 2^120409491905 is an apocalyptic number.

It is an amenable number.

120409491905 is a deficient number, since it is larger than the sum of its proper divisors (29079900415).

120409491905 is a wasteful number, since it uses less digits than its factorization.

120409491905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86368.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 120409491905 in words is "one hundred twenty billion, four hundred nine million, four hundred ninety-one thousand, nine hundred five".