1642381792987 has 8 divisors (see below), whose sum is σ = 1769490241904. Its totient is φ = 1515383542368.

The previous prime is 1642381792973. The next prime is 1642381793011. The reversal of 1642381792987 is 7892971832461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1642381792987 - 2¹⁵ = 1642381760219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642381792927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27518613 + ... + 27578230.

It is an arithmetic number, because the mean of its divisors is an integer number (221186280238).

Almost surely, 2^{1642381792987} is an apocalyptic number.

1642381792987 is a deficient number, since it is larger than the sum of its proper divisors (127108448917).

1642381792987 is a wasteful number, since it uses less digits than its factorization.

1642381792987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55099149.

The product of its digits is 73156608, while the sum is 67.

The spelling of 1642381792987 in words is "one trillion, six hundred forty-two billion, three hundred eighty-one million, seven hundred ninety-two thousand, nine hundred eighty-seven".