6649862131 has 8 divisors (see below), whose sum is σ = 7260064704. Its totient is φ = 6040604520.

The previous prime is 6649862129. The next prime is 6649862159. The reversal of 6649862131 is 1312689466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6649862131 - 2¹ = 6649862129 is a prime.

It is a super-2 number, since 2×6649862131² = 88441332722615722322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6649862431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221481 + ... + 249706.

It is an arithmetic number, because the mean of its divisors is an integer number (907508088).

Almost surely, 2^6649862131 is an apocalyptic number.

6649862131 is a deficient number, since it is larger than the sum of its proper divisors (610202573).

6649862131 is a wasteful number, since it uses less digits than its factorization.

6649862131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472481.

The product of its digits is 373248, while the sum is 46.

The square root of 6649862131 is about 81546.6868180431. The cubic root of 6649862131 is about 1880.4893598399.

The spelling of 6649862131 in words is "six billion, six hundred forty-nine million, eight hundred sixty-two thousand, one hundred thirty-one".