42402004642 has 8 divisors (see below), whose sum is σ = 63605645100. Its totient is φ = 21200122944.

The previous prime is 42402004621. The next prime is 42402004649. The reversal of 42402004642 is 24640020424.

It can be written as a sum of positive squares in 2 ways, for example, as 41885306281 + 516698361 = 204659^2 + 22731^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 42402004642.

It is not an unprimeable number, because it can be changed into a prime (42402004649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377667 + ... + 476902.

Almost surely, 2^42402004642 is an apocalyptic number.

42402004642 is a deficient number, since it is larger than the sum of its proper divisors (21203640458).

42402004642 is a wasteful number, since it uses less digits than its factorization.

42402004642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879380.

The product of its (nonzero) digits is 12288, while the sum is 28.

The spelling of 42402004642 in words is "forty-two billion, four hundred two million, four thousand, six hundred forty-two".