1247463868491 has 12 divisors (see below), whose sum is σ = 1801930235040. Its totient is φ = 831625049520.

The previous prime is 1247463868487. The next prime is 1247463868549. The reversal of 1247463868491 is 1948683647421.

1247463868491 is a `hidden beast` number, since 1 + 2 + 4 + 7 + 4 + 63 + 86 + 8 + 491 = 666.

It is not a de Polignac number, because 1247463868491 - 2² = 1247463868487 is a prime.

It is a super-2 number, since 2×1247463868491² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1247463868591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002520 + ... + 1870821.

It is an arithmetic number, because the mean of its divisors is an integer number (150160852920).

Almost surely, 2^{1247463868491} is an apocalyptic number.

1247463868491 is a deficient number, since it is larger than the sum of its proper divisors (554466366549).

1247463868491 is a wasteful number, since it uses less digits than its factorization.

1247463868491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921586 (or 2921583 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 1247463868491 in words is "one trillion, two hundred forty-seven billion, four hundred sixty-three million, eight hundred sixty-eight thousand, four hundred ninety-one".