3861001231650 has 72 divisors (see below), whose sum is σ = 10373829843780. Its totient is φ = 1029540126720.

The previous prime is 3861001231649. The next prime is 3861001231669. The reversal of 3861001231650 is 561321001683.

3861001231650 is a `hidden beast` number, since 3 + 8 + 610 + 0 + 1 + 2 + 31 + 6 + 5 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2645739724329 + 1215261507321 = 1626573^2 + 1102389^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7736074 + ... + 8220026.

Almost surely, 2^{3861001231650} is an apocalyptic number.

3861001231650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3861001231650 is an abundant number, since it is smaller than the sum of its proper divisors (6512828612130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3861001231650 is a wasteful number, since it uses less digits than its factorization.

3861001231650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501700 (or 501692 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 3861001231650 in words is "three trillion, eight hundred sixty-one billion, one million, two hundred thirty-one thousand, six hundred fifty".