6296951981 has 4 divisors (see below), whose sum is σ = 6400180764. Its totient is φ = 6193723200.

The previous prime is 6296951951. The next prime is 6296951989. The reversal of 6296951981 is 1891596926.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1891596926 = 2 ⋅945798463.

It can be written as a sum of positive squares in 2 ways, for example, as 1926419881 + 4370532100 = 43891^2 + 66110^2 .

It is a cyclic number.

It is not a de Polignac number, because 6296951981 - 2²⁶ = 6229843117 is a prime.

It is a super-2 number, since 2×6296951981² = 79303208502039648722, 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 (6296951989) 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, 51614300 + ... + 51614421.

It is an arithmetic number, because the mean of its divisors is an integer number (1600045191).

Almost surely, 2^6296951981 is an apocalyptic number.

6296951981 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6296951981 is a deficient number, since it is larger than the sum of its proper divisors (103228783).

6296951981 is a wasteful number, since it uses less digits than its factorization.

6296951981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103228782.

The product of its digits is 2099520, while the sum is 56.

The square root of 6296951981 is about 79353.3362940715. The cubic root of 6296951981 is about 1846.6168488945.

The spelling of 6296951981 in words is "six billion, two hundred ninety-six million, nine hundred fifty-one thousand, nine hundred eighty-one".