1601650015555 has 4 divisors (see below), whose sum is σ = 1921980018672. Its totient is φ = 1281320012440.

The previous prime is 1601650015519. The next prime is 1601650015597. The reversal of 1601650015555 is 5555100561061.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1601650015555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160165001551 + ... + 160165001560.

It is an arithmetic number, because the mean of its divisors is an integer number (480495004668).

Almost surely, 2^{1601650015555} is an apocalyptic number.

1601650015555 is a deficient number, since it is larger than the sum of its proper divisors (320330003117).

1601650015555 is an equidigital number, since it uses as much as digits as its factorization.

1601650015555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320330003116.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 1601650015555 in words is "one trillion, six hundred one billion, six hundred fifty million, fifteen thousand, five hundred fifty-five".