6412997691 has 28 divisors (see below), whose sum is σ = 9621766440. Its totient is φ = 4272367680.

The previous prime is 6412997687. The next prime is 6412997693. The reversal of 6412997691 is 1967992146.

It is a happy number.

It is not a de Polignac number, because 6412997691 - 2² = 6412997687 is a prime.

It is a super-2 number, since 2×6412997691² = 82253078769542662962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6412997693) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1703251 + ... + 1707011.

Almost surely, 2^6412997691 is an apocalyptic number.

6412997691 is a deficient number, since it is larger than the sum of its proper divisors (3208768749).

6412997691 is an equidigital number, since it uses as much as digits as its factorization.

6412997691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118 (or 6103 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 6412997691 is about 80081.1943654689. The cubic root of 6412997691 is about 1857.8915572427.

The spelling of 6412997691 in words is "six billion, four hundred twelve million, nine hundred ninety-seven thousand, six hundred ninety-one".