861015345 has 32 divisors (see below), whose sum is σ = 1425164160. Its totient is φ = 443543040.

The previous prime is 861015319. The next prime is 861015347. The reversal of 861015345 is 543510168.

It is not a de Polignac number, because 861015345 - 2¹³ = 861007153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861015347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71565 + ... + 82725.

It is an arithmetic number, because the mean of its divisors is an integer number (44536380).

Almost surely, 2^861015345 is an apocalyptic number.

It is an amenable number.

861015345 is a deficient number, since it is larger than the sum of its proper divisors (564148815).

861015345 is a wasteful number, since it uses less digits than its factorization.

861015345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11345.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 861015345 is about 29343.0629791779. The cubic root of 861015345 is about 951.3426426280.

The spelling of 861015345 in words is "eight hundred sixty-one million, fifteen thousand, three hundred forty-five".