1256344482987 has 48 divisors (see below), whose sum is σ = 2001421543680. Its totient is φ = 753080328000.

The previous prime is 1256344482937. The next prime is 1256344483013. The reversal of 1256344482987 is 7892844436521.

1256344482987 is a `hidden beast` number, since 1 + 2 + 5 + 63 + 4 + 4 + 482 + 98 + 7 = 666.

It is not a de Polignac number, because 1256344482987 - 2²³ = 1256336094379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256344482917) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9402714 + ... + 9535392.

It is an arithmetic number, because the mean of its divisors is an integer number (41696282160).

Almost surely, 2^{1256344482987} is an apocalyptic number.

1256344482987 is a deficient number, since it is larger than the sum of its proper divisors (745077060693).

1256344482987 is a wasteful number, since it uses less digits than its factorization.

1256344482987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133744 (or 133741 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 63.

The spelling of 1256344482987 in words is "one trillion, two hundred fifty-six billion, three hundred forty-four million, four hundred eighty-two thousand, nine hundred eighty-seven".