651433642 has 24 divisors (see below), whose sum is σ = 1042328196. Its totient is φ = 304288896.

The previous prime is 651433619. The next prime is 651433681. The reversal of 651433642 is 246334156.

It can be written as a sum of positive squares in 2 ways, for example, as 650811121 + 622521 = 25511^2 + 789^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 651433598 and 651433607.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2351608 + ... + 2351884.

Almost surely, 2^651433642 is an apocalyptic number.

651433642 is a deficient number, since it is larger than the sum of its proper divisors (390894554).

651433642 is a wasteful number, since it uses less digits than its factorization.

651433642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 559 counting only the distinct ones).

The product of its digits is 51840, while the sum is 34.

The square root of 651433642 is about 25523.1981146564. The cubic root of 651433642 is about 866.8754975724.

Adding to 651433642 its reverse (246334156), we get a palindrome (897767798).

The spelling of 651433642 in words is "six hundred fifty-one million, four hundred thirty-three thousand, six hundred forty-two".