70321312651 has 16 divisors (see below), whose sum is σ = 74625321600. Its totient is φ = 66036096000.

The previous prime is 70321312643. The next prime is 70321312657. The reversal of 70321312651 is 15621312307.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 70321312651 - 2³ = 70321312643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70321312657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20387175 + ... + 20390623.

It is an arithmetic number, because the mean of its divisors is an integer number (4664082600).

Almost surely, 2^70321312651 is an apocalyptic number.

70321312651 is a deficient number, since it is larger than the sum of its proper divisors (4304008949).

70321312651 is a wasteful number, since it uses less digits than its factorization.

70321312651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5814.

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 70321312651 its reverse (15621312307), we get a palindrome (85942624958).

The spelling of 70321312651 in words is "seventy billion, three hundred twenty-one million, three hundred twelve thousand, six hundred fifty-one".