646155045515001 has 32 divisors (see below), whose sum is σ = 980731103063040. Its totient is φ = 374580473854400.

The previous prime is 646155045514949. The next prime is 646155045515009. The reversal of 646155045515001 is 100515540551646.

It is not a de Polignac number, because 646155045515001 - 2¹³ = 646155045506809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646155045515009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134184946 + ... + 138916916.

It is an arithmetic number, because the mean of its divisors is an integer number (30647846970720).

Almost surely, 2^{646155045515001} is an apocalyptic number.

It is an amenable number.

646155045515001 is a deficient number, since it is larger than the sum of its proper divisors (334576057548039).

646155045515001 is a wasteful number, since it uses less digits than its factorization.

646155045515001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911917.

The product of its (nonzero) digits is 1800000, while the sum is 48.

The spelling of 646155045515001 in words is "six hundred forty-six trillion, one hundred fifty-five billion, forty-five million, five hundred fifteen thousand, one".