265720454655 has 16 divisors (see below), whose sum is σ = 425163203424. Its totient is φ = 141714083840.

The previous prime is 265720454611. The next prime is 265720454687. The reversal of 265720454655 is 556454027562.

It is not a de Polignac number, because 265720454655 - 2¹³ = 265720446463 is a prime.

It is a super-2 number, since 2×265720454655² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 265720454598 and 265720454607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483607 + ... + 874823.

It is an arithmetic number, because the mean of its divisors is an integer number (26572700214).

Almost surely, 2^265720454655 is an apocalyptic number.

265720454655 is a deficient number, since it is larger than the sum of its proper divisors (159442748769).

265720454655 is a wasteful number, since it uses less digits than its factorization.

265720454655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436506.

The product of its (nonzero) digits is 10080000, while the sum is 51.

The spelling of 265720454655 in words is "two hundred sixty-five billion, seven hundred twenty million, four hundred fifty-four thousand, six hundred fifty-five".