651434263653 has 4 divisors (see below), whose sum is σ = 868579018208. Its totient is φ = 434289509100.

The previous prime is 651434263651. The next prime is 651434263661. The reversal of 651434263653 is 356362434156.

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 not a de Polignac number, because 651434263653 - 2¹ = 651434263651 is a prime.

It is a super-2 number, since 2×651434263653² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651434263651) 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, 108572377273 + ... + 108572377278.

It is an arithmetic number, because the mean of its divisors is an integer number (217144754552).

Almost surely, 2^651434263653 is an apocalyptic number.

It is an amenable number.

651434263653 is a deficient number, since it is larger than the sum of its proper divisors (217144754555).

651434263653 is a wasteful number, since it uses less digits than its factorization.

651434263653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217144754554.

The product of its digits is 4665600, while the sum is 48.

The spelling of 651434263653 in words is "six hundred fifty-one billion, four hundred thirty-four million, two hundred sixty-three thousand, six hundred fifty-three".