651438145 has 8 divisors (see below), whose sum is σ = 783493056. Its totient is φ = 519972336.

The previous prime is 651438143. The next prime is 651438157. The reversal of 651438145 is 541834156.

It is a happy number.

651438145 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 651438145 - 2¹ = 651438143 is a prime.

It is a super-2 number, since 2×651438145² = 848743313522082050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651438143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144837 + ... + 149266.

It is an arithmetic number, because the mean of its divisors is an integer number (97936632).

Almost surely, 2^651438145 is an apocalyptic number.

It is an amenable number.

651438145 is a deficient number, since it is larger than the sum of its proper divisors (132054911).

651438145 is a wasteful number, since it uses less digits than its factorization.

651438145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294551.

The product of its digits is 57600, while the sum is 37.

The square root of 651438145 is about 25523.2863283708. The cubic root of 651438145 is about 866.8774949779.

The spelling of 651438145 in words is "six hundred fifty-one million, four hundred thirty-eight thousand, one hundred forty-five".