8155261554681 has 16 divisors (see below), whose sum is σ = 10919704171904. Its totient is φ = 5413865917824.

The previous prime is 8155261554673. The next prime is 8155261554689. The reversal of 8155261554681 is 1864551625518.

It is an interprime number because it is at equal distance from previous prime (8155261554673) and next prime (8155261554689).

It is not a de Polignac number, because 8155261554681 - 2³ = 8155261554673 is a prime.

It is a super-2 number, since 2×8155261554681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8155261554689) 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, 3582706 + ... + 5398731.

It is an arithmetic number, because the mean of its divisors is an integer number (682481510744).

Almost surely, 2^{8155261554681} is an apocalyptic number.

It is an amenable number.

8155261554681 is a deficient number, since it is larger than the sum of its proper divisors (2764442617223).

8155261554681 is a wasteful number, since it uses less digits than its factorization.

8155261554681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8982720.

The product of its digits is 11520000, while the sum is 57.

The spelling of 8155261554681 in words is "eight trillion, one hundred fifty-five billion, two hundred sixty-one million, five hundred fifty-four thousand, six hundred eighty-one".