1231746828851 has 16 divisors (see below), whose sum is σ = 1535799902208. Its totient is φ = 959730508800.

The previous prime is 1231746828833. The next prime is 1231746828859. The reversal of 1231746828851 is 1588286471321.

It is a happy number.

It is not a de Polignac number, because 1231746828851 - 2¹⁸ = 1231746566707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231746828859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439886 + ... + 1630028.

It is an arithmetic number, because the mean of its divisors is an integer number (95987493888).

Almost surely, 2^{1231746828851} is an apocalyptic number.

1231746828851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231746828851 is a deficient number, since it is larger than the sum of its proper divisors (304053073357).

1231746828851 is a wasteful number, since it uses less digits than its factorization.

1231746828851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203602.

The product of its digits is 5160960, while the sum is 56.

The spelling of 1231746828851 in words is "one trillion, two hundred thirty-one billion, seven hundred forty-six million, eight hundred twenty-eight thousand, eight hundred fifty-one".