651942267842 has 4 divisors (see below), whose sum is σ = 977913401766. Its totient is φ = 325971133920.

The previous prime is 651942267833. The next prime is 651942267857. The reversal of 651942267842 is 248762249156.

651942267842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 531352065721 + 120590202121 = 728939^2 + 347261^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162985566959 + ... + 162985566962.

Almost surely, 2^651942267842 is an apocalyptic number.

651942267842 is a deficient number, since it is larger than the sum of its proper divisors (325971133924).

651942267842 is a wasteful number, since it uses less digits than its factorization.

651942267842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325971133923.

The product of its digits is 11612160, while the sum is 56.

The spelling of 651942267842 in words is "six hundred fifty-one billion, nine hundred forty-two million, two hundred sixty-seven thousand, eight hundred forty-two".