651928964242 has 16 divisors (see below), whose sum is σ = 983662773912. Its totient is φ = 324042716160.

The previous prime is 651928964221. The next prime is 651928964263. The reversal of 651928964242 is 242469829156.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (651928964221) and next prime (651928964263).

It can be written as a sum of positive squares in 4 ways, for example, as 250681463761 + 401247500481 = 500681^2 + 633441^2 .

It is a super-2 number, since 2×651928964242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640498 + ... + 1309234.

Almost surely, 2^651928964242 is an apocalyptic number.

651928964242 is a deficient number, since it is larger than the sum of its proper divisors (331733809670).

651928964242 is a wasteful number, since it uses less digits than its factorization.

651928964242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671613.

The product of its digits is 14929920, while the sum is 58.

The spelling of 651928964242 in words is "six hundred fifty-one billion, nine hundred twenty-eight million, nine hundred sixty-four thousand, two hundred forty-two".