651145992 has 32 divisors (see below), whose sum is σ = 1860417600. Its totient is φ = 186041664.

The previous prime is 651145981. The next prime is 651145993. The reversal of 651145992 is 299541156.

651145992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×651145992² = 847982205795328128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (651145993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1937767 + ... + 1938102.

It is an arithmetic number, because the mean of its divisors is an integer number (58138050).

Almost surely, 2^651145992 is an apocalyptic number.

It is an amenable number.

651145992 is an abundant number, since it is smaller than the sum of its proper divisors (1209271608).

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

651145992 is a wasteful number, since it uses less digits than its factorization.

651145992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875885 (or 3875881 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 651145992 is about 25517.5624227707. The cubic root of 651145992 is about 866.7478849592.

The spelling of 651145992 in words is "six hundred fifty-one million, one hundred forty-five thousand, nine hundred ninety-two".