651640235011 has 4 divisors (see below), whose sum is σ = 651739320232. Its totient is φ = 651541149792.

The previous prime is 651640235003. The next prime is 651640235021. The reversal of 651640235011 is 110532046156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 651640235011 - 2³ = 651640235003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651640235021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49532745 + ... + 49545898.

It is an arithmetic number, because the mean of its divisors is an integer number (162934830058).

Almost surely, 2^651640235011 is an apocalyptic number.

651640235011 is a deficient number, since it is larger than the sum of its proper divisors (99085221).

651640235011 is an equidigital number, since it uses as much as digits as its factorization.

651640235011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99085220.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 651640235011 in words is "six hundred fifty-one billion, six hundred forty million, two hundred thirty-five thousand, eleven".