643115367155 has 32 divisors (see below), whose sum is σ = 850958949888. Its totient is φ = 464460595200.

The previous prime is 643115367143. The next prime is 643115367197. The reversal of 643115367155 is 551763511346.

It is not a de Polignac number, because 643115367155 - 2³⁰ = 642041625331 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 782186 + ... + 1377695.

It is an arithmetic number, because the mean of its divisors is an integer number (26592467184).

Almost surely, 2^643115367155 is an apocalyptic number.

643115367155 is a deficient number, since it is larger than the sum of its proper divisors (207843582733).

643115367155 is a wasteful number, since it uses less digits than its factorization.

643115367155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160047.

The product of its digits is 1134000, while the sum is 47.

The spelling of 643115367155 in words is "six hundred forty-three billion, one hundred fifteen million, three hundred sixty-seven thousand, one hundred fifty-five".