201381387256 has 64 divisors (see below), whose sum is σ = 433870145280. Its totient is φ = 85839505920.

The previous prime is 201381387253. The next prime is 201381387341. The reversal of 201381387256 is 652783183102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201381387253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11152171 + ... + 11170213.

It is an arithmetic number, because the mean of its divisors is an integer number (6779221020).

Almost surely, 2^201381387256 is an apocalyptic number.

It is an amenable number.

201381387256 is an abundant number, since it is smaller than the sum of its proper divisors (232488758024).

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

201381387256 is a wasteful number, since it uses less digits than its factorization.

201381387256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19124 (or 19120 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 201381387256 in words is "two hundred one billion, three hundred eighty-one million, three hundred eighty-seven thousand, two hundred fifty-six".