42120787967999 has 16 divisors (see below), whose sum is σ = 45540575760288. Its totient is φ = 38726696927232.

The previous prime is 42120787967983. The next prime is 42120787968001. The reversal of 42120787967999 is 99976978702124.

It is a cyclic number.

It is not a de Polignac number, because 42120787967999 - 2⁴ = 42120787967983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42120787967939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47493959 + ... + 48372695.

It is an arithmetic number, because the mean of its divisors is an integer number (2846285985018).

Almost surely, 2^{42120787967999} is an apocalyptic number.

42120787967999 is a deficient number, since it is larger than the sum of its proper divisors (3419787792289).

42120787967999 is a wasteful number, since it uses less digits than its factorization.

42120787967999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893354.

The product of its (nonzero) digits is 1728324864, while the sum is 80.

The spelling of 42120787967999 in words is "forty-two trillion, one hundred twenty billion, seven hundred eighty-seven million, nine hundred sixty-seven thousand, nine hundred ninety-nine".