1281531457715 has 16 divisors (see below), whose sum is σ = 1628380065600. Its totient is φ = 964869642240.

The previous prime is 1281531457697. The next prime is 1281531457727. The reversal of 1281531457715 is 5177541351821.

It is not a de Polignac number, because 1281531457715 - 2¹⁰ = 1281531456691 is a prime.

It is a super-2 number, since 2×1281531457715² (a number of 25 digits) contains 22 as substring.

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, 1384955 + ... + 2116875.

It is an arithmetic number, because the mean of its divisors is an integer number (101773754100).

Almost surely, 2^{1281531457715} is an apocalyptic number.

1281531457715 is a deficient number, since it is larger than the sum of its proper divisors (346848607885).

1281531457715 is a wasteful number, since it uses less digits than its factorization.

1281531457715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752542.

The product of its digits is 1176000, while the sum is 50.

The spelling of 1281531457715 in words is "one trillion, two hundred eighty-one billion, five hundred thirty-one million, four hundred fifty-seven thousand, seven hundred fifteen".