3621863493 has 6 divisors (see below), whose sum is σ = 5231580614. Its totient is φ = 2414575656.

The previous prime is 3621863489. The next prime is 3621863513. The reversal of 3621863493 is 3943681263.

3621863493 is a `hidden beast` number, since 3 + 6 + 2 + 1 + 8 + 634 + 9 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3223741284 + 398122209 = 56778^2 + 19953^2 .

It is not a de Polignac number, because 3621863493 - 2² = 3621863489 is a prime.

It is a super-2 number, since 2×3621863493² = 26235790323852322098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621863473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201214630 + ... + 201214647.

Almost surely, 2^3621863493 is an apocalyptic number.

It is an amenable number.

3621863493 is a deficient number, since it is larger than the sum of its proper divisors (1609717121).

3621863493 is a wasteful number, since it uses less digits than its factorization.

3621863493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402429283 (or 402429280 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 3621863493 is about 60181.9199843275. The cubic root of 3621863493 is about 1535.7152347359.

The spelling of 3621863493 in words is "three billion, six hundred twenty-one million, eight hundred sixty-three thousand, four hundred ninety-three".