1391244231552 has 128 divisors (see below), whose sum is σ = 4445705414400. Its totient is φ = 376577372160.

The previous prime is 1391244231521. The next prime is 1391244231593. The reversal of 1391244231552 is 2551324421931.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 13569349 + ... + 13671492.

It is an arithmetic number, because the mean of its divisors is an integer number (34732073550).

Almost surely, 2^{1391244231552} is an apocalyptic number.

1391244231552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1391244231552 is an abundant number, since it is smaller than the sum of its proper divisors (3054461182848).

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

1391244231552 is a wasteful number, since it uses less digits than its factorization.

1391244231552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27240884 (or 27240872 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 1391244231552 in words is "one trillion, three hundred ninety-one billion, two hundred forty-four million, two hundred thirty-one thousand, five hundred fifty-two".