42787674921 has 8 divisors (see below), whose sum is σ = 57054472480. Its totient is φ = 28522996992.

The previous prime is 42787674889. The next prime is 42787674931. The reversal of 42787674921 is 12947678724.

42787674921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42787674921 - 2⁵ = 42787674889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42787674931) 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, 482191 + ... + 563988.

It is an arithmetic number, because the mean of its divisors is an integer number (7131809060).

Almost surely, 2^42787674921 is an apocalyptic number.

It is an amenable number.

42787674921 is a deficient number, since it is larger than the sum of its proper divisors (14266797559).

42787674921 is a wasteful number, since it uses less digits than its factorization.

42787674921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059815.

The product of its digits is 9483264, while the sum is 57.

The spelling of 42787674921 in words is "forty-two billion, seven hundred eighty-seven million, six hundred seventy-four thousand, nine hundred twenty-one".