1312555105515 has 16 divisors (see below), whose sum is σ = 2119715163648. Its totient is φ = 693487058016.

The previous prime is 1312555105487. The next prime is 1312555105523. The reversal of 1312555105515 is 5155015552131.

It is a happy number.

It is not a de Polignac number, because 1312555105515 - 2¹⁸ = 1312554843371 is a prime.

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, 408894067 + ... + 408897276.

It is an arithmetic number, because the mean of its divisors is an integer number (132482197728).

Almost surely, 2^{1312555105515} is an apocalyptic number.

1312555105515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1312555105515 is a deficient number, since it is larger than the sum of its proper divisors (807160058133).

1312555105515 is a wasteful number, since it uses less digits than its factorization.

1312555105515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817791458.

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 1312555105515 in words is "one trillion, three hundred twelve billion, five hundred fifty-five million, one hundred five thousand, five hundred fifteen".