861957063 has 48 divisors (see below), whose sum is σ = 1410907680. Its totient is φ = 502502400.

The previous prime is 861957049. The next prime is 861957091. The reversal of 861957063 is 360759168.

It is a happy number.

861957063 is a `hidden beast` number, since 8 + 6 + 19 + 570 + 63 = 666.

It is not a de Polignac number, because 861957063 - 2¹⁸ = 861694919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861957013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 294853 + ... + 297761.

It is an arithmetic number, because the mean of its divisors is an integer number (29393910).

Almost surely, 2^861957063 is an apocalyptic number.

861957063 is a deficient number, since it is larger than the sum of its proper divisors (548950617).

861957063 is a wasteful number, since it uses less digits than its factorization.

861957063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 861957063 is about 29359.1052826887. The cubic root of 861957063 is about 951.6893534702.

The spelling of 861957063 in words is "eight hundred sixty-one million, nine hundred fifty-seven thousand, sixty-three".