651329641 has 4 divisors (see below), whose sum is σ = 659574400. Its totient is φ = 643084884.

The previous prime is 651329639. The next prime is 651329659. The reversal of 651329641 is 146923156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 651329641 - 2¹ = 651329639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 651329641.

It is not an unprimeable number, because it can be changed into a prime (651329681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4122261 + ... + 4122418.

It is an arithmetic number, because the mean of its divisors is an integer number (164893600).

Almost surely, 2^651329641 is an apocalyptic number.

It is an amenable number.

651329641 is a deficient number, since it is larger than the sum of its proper divisors (8244759).

651329641 is an equidigital number, since it uses as much as digits as its factorization.

651329641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244758.

The product of its digits is 38880, while the sum is 37.

The square root of 651329641 is about 25521.1606515064. The cubic root of 651329641 is about 866.8293630618.

The spelling of 651329641 in words is "six hundred fifty-one million, three hundred twenty-nine thousand, six hundred forty-one".