646216406535147 has 32 divisors (see below), whose sum is σ = 986229345157632. Its totient is φ = 368697043835904.

The previous prime is 646216406535131. The next prime is 646216406535151. The reversal of 646216406535147 is 741535604612646.

It is not a de Polignac number, because 646216406535147 - 2⁴ = 646216406535131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646216406535347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1668637348 + ... + 1669024574.

It is an arithmetic number, because the mean of its divisors is an integer number (30819667036176).

Almost surely, 2^{646216406535147} is an apocalyptic number.

646216406535147 is a deficient number, since it is larger than the sum of its proper divisors (340012938622485).

646216406535147 is a wasteful number, since it uses less digits than its factorization.

646216406535147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509587.

The product of its (nonzero) digits is 87091200, while the sum is 60.

The spelling of 646216406535147 in words is "six hundred forty-six trillion, two hundred sixteen billion, four hundred six million, five hundred thirty-five thousand, one hundred forty-seven".