65405163855 has 16 divisors (see below), whose sum is σ = 110156065920. Its totient is φ = 33046819488.

The previous prime is 65405163851. The next prime is 65405163869. The reversal of 65405163855 is 55836150456.

It is a happy number.

It is not a de Polignac number, because 65405163855 - 2² = 65405163851 is a prime.

It is a super-2 number, since 2×65405163855² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65405163851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114745617 + ... + 114746186.

It is an arithmetic number, because the mean of its divisors is an integer number (6884754120).

Almost surely, 2^65405163855 is an apocalyptic number.

65405163855 is a deficient number, since it is larger than the sum of its proper divisors (44750902065).

65405163855 is a wasteful number, since it uses less digits than its factorization.

65405163855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229491830.

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 65405163855 in words is "sixty-five billion, four hundred five million, one hundred sixty-three thousand, eight hundred fifty-five".