1538144923392 has 1152 divisors, whose sum is σ = 6132235468800. Its totient is φ = 368171827200.

The previous prime is 1538144923351. The next prime is 1538144923453. The reversal of 1538144923392 is 2933294418351.

It is a happy number.

1538144923392 is a `hidden beast` number, since 1 + 5 + 3 + 81 + 449 + 2 + 33 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 374151417 + ... + 374155527.

Almost surely, 2^{1538144923392} is an apocalyptic number.

1538144923392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538144923392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3066117734400).

1538144923392 is an abundant number, since it is smaller than the sum of its proper divisors (4594090545408).

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

1538144923392 is a wasteful number, since it uses less digits than its factorization.

1538144923392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 4190 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 1538144923392 in words is "one trillion, five hundred thirty-eight billion, one hundred forty-four million, nine hundred twenty-three thousand, three hundred ninety-two".