1581142785932 has 6 divisors (see below), whose sum is σ = 2766999875388. Its totient is φ = 790571392964.

The previous prime is 1581142785931. The next prime is 1581142785967. The reversal of 1581142785932 is 2395872411851.

It is not an unprimeable number, because it can be changed into a prime (1581142785931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197642848238 + ... + 197642848245.

It is an arithmetic number, because the mean of its divisors is an integer number (461166645898).

Almost surely, 2^{1581142785932} is an apocalyptic number.

It is an amenable number.

1581142785932 is a deficient number, since it is larger than the sum of its proper divisors (1185857089456).

1581142785932 is a wasteful number, since it uses less digits than its factorization.

1581142785932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395285696487 (or 395285696485 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 56.

The spelling of 1581142785932 in words is "one trillion, five hundred eighty-one billion, one hundred forty-two million, seven hundred eighty-five thousand, nine hundred thirty-two".