3642936781 has 16 divisors (see below), whose sum is σ = 4022299008. Its totient is φ = 3271752000.

The previous prime is 3642936767. The next prime is 3642936793. The reversal of 3642936781 is 1876392463.

It is not a de Polignac number, because 3642936781 - 2¹⁷ = 3642805709 is a prime.

It is a super-2 number, since 2×3642936781² = 26541976780725283922, 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 (3642936701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537691 + ... + 544423.

It is an arithmetic number, because the mean of its divisors is an integer number (251393688).

Almost surely, 2^3642936781 is an apocalyptic number.

It is an amenable number.

3642936781 is a deficient number, since it is larger than the sum of its proper divisors (379362227).

3642936781 is a wasteful number, since it uses less digits than its factorization.

3642936781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7332.

The product of its digits is 1306368, while the sum is 49.

The square root of 3642936781 is about 60356.7459444261. The cubic root of 3642936781 is about 1538.6879223180.

The spelling of 3642936781 in words is "three billion, six hundred forty-two million, nine hundred thirty-six thousand, seven hundred eighty-one".