1643676260156 has 24 divisors (see below), whose sum is σ = 3316444141920. Its totient is φ = 698198764032.

The previous prime is 1643676260143. The next prime is 1643676260173. The reversal of 1643676260156 is 6510626763461.

It is a junction number, because it is equal to n+sod(n) for n = 1643676260098 and 1643676260107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259743401 + ... + 259749728.

It is an arithmetic number, because the mean of its divisors is an integer number (138185172580).

Almost surely, 2^{1643676260156} is an apocalyptic number.

It is an amenable number.

1643676260156 is an abundant number, since it is smaller than the sum of its proper divisors (1672767881764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1643676260156 is a wasteful number, since it uses less digits than its factorization.

1643676260156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519493253 (or 519493251 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 1643676260156 in words is "one trillion, six hundred forty-three billion, six hundred seventy-six million, two hundred sixty thousand, one hundred fifty-six".