651843880157 has 4 divisors (see below), whose sum is σ = 651920333376. Its totient is φ = 651767426940.

The previous prime is 651843880151. The next prime is 651843880213. The reversal of 651843880157 is 751088348156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 651843880157 - 2¹⁰ = 651843879133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651843880151) 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, 38213819 + ... + 38230872.

It is an arithmetic number, because the mean of its divisors is an integer number (162980083344).

Almost surely, 2^651843880157 is an apocalyptic number.

It is an amenable number.

651843880157 is a deficient number, since it is larger than the sum of its proper divisors (76453219).

651843880157 is an equidigital number, since it uses as much as digits as its factorization.

651843880157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76453218.

The product of its (nonzero) digits is 6451200, while the sum is 56.

The spelling of 651843880157 in words is "six hundred fifty-one billion, eight hundred forty-three million, eight hundred eighty thousand, one hundred fifty-seven".