3646662387431 has 4 divisors (see below), whose sum is σ = 4167614157072. Its totient is φ = 3125710617792.

The previous prime is 3646662387377. The next prime is 3646662387437. The reversal of 3646662387431 is 1347832666463.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3646662387431 - 2¹⁰ = 3646662386407 is a prime.

It is a super-2 number, since 2×3646662387431² (a number of 26 digits) 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 (3646662387437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260475884810 + ... + 260475884823.

It is an arithmetic number, because the mean of its divisors is an integer number (1041903539268).

Almost surely, 2^{3646662387431} is an apocalyptic number.

3646662387431 is a deficient number, since it is larger than the sum of its proper divisors (520951769641).

3646662387431 is an equidigital number, since it uses as much as digits as its factorization.

3646662387431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520951769640.

The product of its digits is 62705664, while the sum is 59.

The spelling of 3646662387431 in words is "three trillion, six hundred forty-six billion, six hundred sixty-two million, three hundred eighty-seven thousand, four hundred thirty-one".