3654018981 has 48 divisors (see below), whose sum is σ = 5670273024. Its totient is φ = 2259436032.

The previous prime is 3654018967. The next prime is 3654018983. The reversal of 3654018981 is 1898104563.

3654018981 is a `hidden beast` number, since 3 + 6 + 540 + 18 + 98 + 1 = 666.

It is not a de Polignac number, because 3654018981 - 2¹⁹ = 3653494693 is a prime.

It is a super-2 number, since 2×3654018981² = 26703709427016556722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3654018983) 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, 3361020 + ... + 3362106.

It is an arithmetic number, because the mean of its divisors is an integer number (118130688).

Almost surely, 2^3654018981 is an apocalyptic number.

It is an amenable number.

3654018981 is a deficient number, since it is larger than the sum of its proper divisors (2016254043).

3654018981 is a wasteful number, since it uses less digits than its factorization.

3654018981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1407 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 3654018981 is about 60448.4820404946. The cubic root of 3654018981 is about 1540.2466267463.

The spelling of 3654018981 in words is "three billion, six hundred fifty-four million, eighteen thousand, nine hundred eighty-one".