651499873920 has 768 divisors, whose sum is σ = 2675354572800. Its totient is φ = 148410372096.

The previous prime is 651499873891. The next prime is 651499873993. The reversal of 651499873920 is 29378994156.

651499873920 is a `hidden beast` number, since 6 + 51 + 499 + 8 + 7 + 3 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 390820927 + ... + 390822593.

It is an arithmetic number, because the mean of its divisors is an integer number (3483534600).

It is a 1-persistent number, because it is pandigital, but 2⋅651499873920 = 1302999747840 is not.

Almost surely, 2^651499873920 is an apocalyptic number.

651499873920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651499873920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337677286400).

651499873920 is an abundant number, since it is smaller than the sum of its proper divisors (2023854698880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651499873920 is a wasteful number, since it uses less digits than its factorization.

651499873920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067 (or 2043 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 651499873920 in words is "six hundred fifty-one billion, four hundred ninety-nine million, eight hundred seventy-three thousand, nine hundred twenty".