1577145997944 has 192 divisors, whose sum is σ = 4993764272640. Its totient is φ = 444788340480.

The previous prime is 1577145997891. The next prime is 1577145997993. The reversal of 1577145997944 is 4497995417751.

It is a happy number.

1577145997944 is a `hidden beast` number, since 1 + 577 + 1 + 4 + 5 + 9 + 9 + 7 + 9 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 496012 + ... + 1843995.

It is an arithmetic number, because the mean of its divisors is an integer number (26009188920).

Almost surely, 2^{1577145997944} is an apocalyptic number.

It is an amenable number.

1577145997944 is an abundant number, since it is smaller than the sum of its proper divisors (3416618274696).

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

1577145997944 is a wasteful number, since it uses less digits than its factorization.

1577145997944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340090 (or 2340083 counting only the distinct ones).

The product of its digits is 400075200, while the sum is 72.

The spelling of 1577145997944 in words is "one trillion, five hundred seventy-seven billion, one hundred forty-five million, nine hundred ninety-seven thousand, nine hundred forty-four".