651242044 has 6 divisors (see below), whose sum is σ = 1139673584. Its totient is φ = 325621020.

The previous prime is 651241993. The next prime is 651242047. The reversal of 651242044 is 440242156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651242047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81405252 + ... + 81405259.

Almost surely, 2^651242044 is an apocalyptic number.

It is an amenable number.

651242044 is a deficient number, since it is larger than the sum of its proper divisors (488431540).

651242044 is a wasteful number, since it uses less digits than its factorization.

651242044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162810515 (or 162810513 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 651242044 is about 25519.4444296893. Note that the first 4 decimals coincide. The cubic root of 651242044 is about 866.7905015027.

The spelling of 651242044 in words is "six hundred fifty-one million, two hundred forty-two thousand, forty-four".