645015642011 has 32 divisors (see below), whose sum is σ = 701106369600. Its totient is φ = 589886115840.

The previous prime is 645015641999. The next prime is 645015642023. The reversal of 645015642011 is 110246510546.

It is an interprime number because it is at equal distance from previous prime (645015641999) and next prime (645015642023).

It is a cyclic number.

It is not a de Polignac number, because 645015642011 - 2¹⁴ = 645015625627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645015642041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 872821880 + ... + 872822618.

It is an arithmetic number, because the mean of its divisors is an integer number (21909574050).

Almost surely, 2^645015642011 is an apocalyptic number.

645015642011 is a deficient number, since it is larger than the sum of its proper divisors (56090727589).

645015642011 is a wasteful number, since it uses less digits than its factorization.

645015642011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 645015642011 in words is "six hundred forty-five billion, fifteen million, six hundred forty-two thousand, eleven".