1231153706464 has 48 divisors (see below), whose sum is σ = 2700441628416. Its totient is φ = 547708604800.

The previous prime is 1231153706459. The next prime is 1231153706473. The reversal of 1231153706464 is 4646073511321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231153706464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37191922 + ... + 37225009.

It is an arithmetic number, because the mean of its divisors is an integer number (56259200592).

Almost surely, 2^{1231153706464} is an apocalyptic number.

It is an amenable number.

1231153706464 is an abundant number, since it is smaller than the sum of its proper divisors (1469287921952).

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

1231153706464 is a wasteful number, since it uses less digits than its factorization.

1231153706464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74416999 (or 74416991 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 1231153706464 in words is "one trillion, two hundred thirty-one billion, one hundred fifty-three million, seven hundred six thousand, four hundred sixty-four".