6491400031 has 16 divisors (see below), whose sum is σ = 6790176000. Its totient is φ = 6198508800.

The previous prime is 6491400023. The next prime is 6491400089. The reversal of 6491400031 is 1300041946.

It is a cyclic number.

It is not a de Polignac number, because 6491400031 - 2³ = 6491400023 is a prime.

It is a super-2 number, since 2×6491400031² = 84276548724933601922, 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 (6491401031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1490445 + ... + 1494793.

It is an arithmetic number, because the mean of its divisors is an integer number (424386000).

Almost surely, 2^6491400031 is an apocalyptic number.

6491400031 is a deficient number, since it is larger than the sum of its proper divisors (298775969).

6491400031 is a wasteful number, since it uses less digits than its factorization.

6491400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 6491400031 is about 80569.2250862573. The cubic root of 6491400031 is about 1865.4321515548.

Adding to 6491400031 its reverse (1300041946), we get a palindrome (7791441977).

The spelling of 6491400031 in words is "six billion, four hundred ninety-one million, four hundred thousand, thirty-one".