266395901632 has 56 divisors (see below), whose sum is σ = 635945123840. Its totient is φ = 108160738560.

The previous prime is 266395901627. The next prime is 266395901641. The reversal of 266395901632 is 236109593662.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 266395901632.

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, 15639744 + ... + 15656767.

Almost surely, 2^266395901632 is an apocalyptic number.

It is an amenable number.

266395901632 is an abundant number, since it is smaller than the sum of its proper divisors (369549222208).

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

266395901632 is a wasteful number, since it uses less digits than its factorization.

266395901632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31296549 (or 31296539 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 52.

The spelling of 266395901632 in words is "two hundred sixty-six billion, three hundred ninety-five million, nine hundred one thousand, six hundred thirty-two".