855090061 has 4 divisors (see below), whose sum is σ = 977245792. Its totient is φ = 732934332.

The previous prime is 855090043. The next prime is 855090073. The reversal of 855090061 is 160090558.

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 855090061 - 2⁵ = 855090029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 855089999 and 855090026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855090961) 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, 61077855 + ... + 61077868.

It is an arithmetic number, because the mean of its divisors is an integer number (244311448).

Almost surely, 2^855090061 is an apocalyptic number.

It is an amenable number.

855090061 is a deficient number, since it is larger than the sum of its proper divisors (122155731).

855090061 is a wasteful number, since it uses less digits than its factorization.

855090061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122155730.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 855090061 is about 29241.9230044811. The cubic root of 855090061 is about 949.1553197308.

The spelling of 855090061 in words is "eight hundred fifty-five million, ninety thousand, sixty-one".