361856901 has 32 divisors (see below), whose sum is σ = 565014528. Its totient is φ = 201700800.

The previous prime is 361856899. The next prime is 361856927. The reversal of 361856901 is 109658163.

It is not a de Polignac number, because 361856901 - 2¹ = 361856899 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 361856901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361856701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515851 + ... + 516551.

It is an arithmetic number, because the mean of its divisors is an integer number (17656704).

Almost surely, 2^361856901 is an apocalyptic number.

361856901 is the 10983-rd octagonal number.

It is an amenable number.

361856901 is a deficient number, since it is larger than the sum of its proper divisors (203157627).

361856901 is a wasteful number, since it uses less digits than its factorization.

361856901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 361856901 is about 19022.5366604983. The cubic root of 361856901 is about 712.5996748212.

The spelling of 361856901 in words is "three hundred sixty-one million, eight hundred fifty-six thousand, nine hundred one".