861080057 has 4 divisors (see below), whose sum is σ = 906400080. Its totient is φ = 815760036.

The previous prime is 861080009. The next prime is 861080083. The reversal of 861080057 is 750080168.

It is a happy number.

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 861080057 - 2¹² = 861075961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861079999 and 861080026.

It is not an unprimeable number, because it can be changed into a prime (861080357) 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, 22659983 + ... + 22660020.

It is an arithmetic number, because the mean of its divisors is an integer number (226600020).

Almost surely, 2^861080057 is an apocalyptic number.

It is an amenable number.

861080057 is a deficient number, since it is larger than the sum of its proper divisors (45320023).

861080057 is a wasteful number, since it uses less digits than its factorization.

861080057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45320022.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 861080057 is about 29344.1656381639. The cubic root of 861080057 is about 951.3664756306.

The spelling of 861080057 in words is "eight hundred sixty-one million, eighty thousand, fifty-seven".