651378885 has 32 divisors (see below), whose sum is σ = 1108017792. Its totient is φ = 325632000.

The previous prime is 651378859. The next prime is 651378887. The reversal of 651378885 is 588873156.

It is not a de Polignac number, because 651378885 - 2⁵ = 651378853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651378887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58917 + ... + 69093.

It is an arithmetic number, because the mean of its divisors is an integer number (34625556).

Almost surely, 2^651378885 is an apocalyptic number.

It is an amenable number.

651378885 is a deficient number, since it is larger than the sum of its proper divisors (456638907).

651378885 is a wasteful number, since it uses less digits than its factorization.

651378885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10453.

The product of its digits is 1612800, while the sum is 51.

The square root of 651378885 is about 25522.1254013062. The cubic root of 651378885 is about 866.8512081547.

The spelling of 651378885 in words is "six hundred fifty-one million, three hundred seventy-eight thousand, eight hundred eighty-five".