3865423626551 has 4 divisors (see below), whose sum is σ = 3865430529072. Its totient is φ = 3865416724032.

The previous prime is 3865423626541. The next prime is 3865423626557. The reversal of 3865423626551 is 1556263245683.

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 3865423626551 - 2¹⁰ = 3865423625527 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 (3865423626557) 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, 2529131 + ... + 3758636.

It is an arithmetic number, because the mean of its divisors is an integer number (966357632268).

Almost surely, 2^{3865423626551} is an apocalyptic number.

3865423626551 is a deficient number, since it is larger than the sum of its proper divisors (6902521).

3865423626551 is an equidigital number, since it uses as much as digits as its factorization.

3865423626551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902520.

The product of its digits is 31104000, while the sum is 56.

The spelling of 3865423626551 in words is "three trillion, eight hundred sixty-five billion, four hundred twenty-three million, six hundred twenty-six thousand, five hundred fifty-one".