686325261021511 has 4 divisors (see below), whose sum is σ = 708464785570624. Its totient is φ = 664185736472400.

The previous prime is 686325261021431. The next prime is 686325261021539. The reversal of 686325261021511 is 115120162523686.

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 686325261021511 - 2⁹ = 686325261020999 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 (686325261024511) 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, 11069762274510 + ... + 11069762274571.

It is an arithmetic number, because the mean of its divisors is an integer number (177116196392656).

Almost surely, 2^{686325261021511} is an apocalyptic number.

686325261021511 is a deficient number, since it is larger than the sum of its proper divisors (22139524549113).

686325261021511 is a wasteful number, since it uses less digits than its factorization.

686325261021511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22139524549112.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 686325261021511 in words is "six hundred eighty-six trillion, three hundred twenty-five billion, two hundred sixty-one million, twenty-one thousand, five hundred eleven".