2156546460664 has 8 divisors (see below), whose sum is σ = 4043524613760. Its totient is φ = 1078273230328.

The previous prime is 2156546460659. The next prime is 2156546460749. The reversal of 2156546460664 is 4660646456512.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134784153784 + ... + 134784153799.

It is an arithmetic number, because the mean of its divisors is an integer number (505440576720).

Almost surely, 2^{2156546460664} is an apocalyptic number.

It is an amenable number.

2156546460664 is a deficient number, since it is larger than the sum of its proper divisors (1886978153096).

2156546460664 is a wasteful number, since it uses less digits than its factorization.

2156546460664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269568307589 (or 269568307585 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 55.

The spelling of 2156546460664 in words is "two trillion, one hundred fifty-six billion, five hundred forty-six million, four hundred sixty thousand, six hundred sixty-four".