1231672855376 has 20 divisors (see below), whose sum is σ = 2490121208352. Its totient is φ = 589060930656.

The previous prime is 1231672855373. The next prime is 1231672855379. The reversal of 1231672855376 is 6735582761321.

It is an interprime number because it is at equal distance from previous prime (1231672855373) and next prime (1231672855379).

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231672855373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673468186 + ... + 1673468921.

Almost surely, 2^{1231672855376} is an apocalyptic number.

1231672855376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1231672855376 is an abundant number, since it is smaller than the sum of its proper divisors (1258448352976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231672855376 is a wasteful number, since it uses less digits than its factorization.

1231672855376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346937138 (or 3346937132 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 56.

The spelling of 1231672855376 in words is "one trillion, two hundred thirty-one billion, six hundred seventy-two million, eight hundred fifty-five thousand, three hundred seventy-six".