65512313623 has 4 divisors (see below), whose sum is σ = 66622691880. Its totient is φ = 64401935368.

The previous prime is 65512313621. The next prime is 65512313639. The reversal of 65512313623 is 32631321556.

65512313623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65512313623 - 2¹ = 65512313621 is a prime.

It is a super-2 number, since 2×65512313623² (a number of 22 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 (65512313621) 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, 555189040 + ... + 555189157.

It is an arithmetic number, because the mean of its divisors is an integer number (16655672970).

Almost surely, 2^65512313623 is an apocalyptic number.

65512313623 is a deficient number, since it is larger than the sum of its proper divisors (1110378257).

65512313623 is a wasteful number, since it uses less digits than its factorization.

65512313623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110378256.

The product of its digits is 97200, while the sum is 37.

It can be divided in two parts, 655123 and 13623, that added together give a triangular number (668746 = T₁₁₅₆).

The spelling of 65512313623 in words is "sixty-five billion, five hundred twelve million, three hundred thirteen thousand, six hundred twenty-three".