2563447656466 has 32 divisors (see below), whose sum is σ = 4008945540096. Its totient is φ = 1227963000000.

The previous prime is 2563447656401. The next prime is 2563447656491. The reversal of 2563447656466 is 6646567443652.

It is a junction number, because it is equal to n+sod(n) for n = 2563447656398 and 2563447656407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80720091 + ... + 80751841.

It is an arithmetic number, because the mean of its divisors is an integer number (125279548128).

Almost surely, 2^{2563447656466} is an apocalyptic number.

2563447656466 is a deficient number, since it is larger than the sum of its proper divisors (1445497883630).

2563447656466 is a wasteful number, since it uses less digits than its factorization.

2563447656466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44778.

The product of its digits is 522547200, while the sum is 64.

The spelling of 2563447656466 in words is "two trillion, five hundred sixty-three billion, four hundred forty-seven million, six hundred fifty-six thousand, four hundred sixty-six".