155042681081 has 4 divisors (see below), whose sum is σ = 155085243792. Its totient is φ = 155000118372.

The previous prime is 155042681051. The next prime is 155042681093. The reversal of 155042681081 is 180186240551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155042681081 - 2¹⁴ = 155042664697 is a prime.

It is a super-2 number, since 2×155042681081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155042681011) 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, 21275891 + ... + 21283176.

It is an arithmetic number, because the mean of its divisors is an integer number (38771310948).

Almost surely, 2^155042681081 is an apocalyptic number.

It is an amenable number.

155042681081 is a deficient number, since it is larger than the sum of its proper divisors (42562711).

155042681081 is an equidigital number, since it uses as much as digits as its factorization.

155042681081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42562710.

The product of its (nonzero) digits is 76800, while the sum is 41.

The spelling of 155042681081 in words is "one hundred fifty-five billion, forty-two million, six hundred eighty-one thousand, eighty-one".