861061958 has 16 divisors (see below), whose sum is σ = 1300484160. Its totient is φ = 427573800.

The previous prime is 861061907. The next prime is 861061963. The reversal of 861061958 is 859160168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547313 + ... + 548883.

It is an arithmetic number, because the mean of its divisors is an integer number (81280260).

Almost surely, 2^861061958 is an apocalyptic number.

861061958 is a deficient number, since it is larger than the sum of its proper divisors (439422202).

861061958 is a wasteful number, since it uses less digits than its factorization.

861061958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 861061958 is about 29343.8572447454. The cubic root of 861061958 is about 951.3598100086.

The spelling of 861061958 in words is "eight hundred sixty-one million, sixty-one thousand, nine hundred fifty-eight".