642742802276 has 12 divisors (see below), whose sum is σ = 1125026850108. Its totient is φ = 321306559392.

The previous prime is 642742802231. The next prime is 642742802309. The reversal of 642742802276 is 672208247246.

It can be written as a sum of positive squares in 2 ways, for example, as 296556484900 + 346186317376 = 544570^2 + 588376^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16188131 + ... + 16227786.

It is an arithmetic number, because the mean of its divisors is an integer number (93752237509).

Almost surely, 2^642742802276 is an apocalyptic number.

It is an amenable number.

642742802276 is a deficient number, since it is larger than the sum of its proper divisors (482284047832).

642742802276 is a wasteful number, since it uses less digits than its factorization.

642742802276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32420878 (or 32420876 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 50.

The spelling of 642742802276 in words is "six hundred forty-two billion, seven hundred forty-two million, eight hundred two thousand, two hundred seventy-six".