1255683821415 has 16 divisors (see below), whose sum is σ = 2009174896608. Its totient is φ = 669671110656.

The previous prime is 1255683821339. The next prime is 1255683821437. The reversal of 1255683821415 is 5141283865521.

It is not a de Polignac number, because 1255683821415 - 2⁸ = 1255683821159 is a prime.

It is a super-2 number, since 2×1255683821415² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 1294582 + ... + 2046291.

It is an arithmetic number, because the mean of its divisors is an integer number (125573431038).

Almost surely, 2^{1255683821415} is an apocalyptic number.

1255683821415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1255683821415 is a deficient number, since it is larger than the sum of its proper divisors (753491075193).

1255683821415 is a wasteful number, since it uses less digits than its factorization.

1255683821415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365938.

The product of its digits is 2304000, while the sum is 51.

The spelling of 1255683821415 in words is "one trillion, two hundred fifty-five billion, six hundred eighty-three million, eight hundred twenty-one thousand, four hundred fifteen".