6491618542 has 8 divisors (see below), whose sum is σ = 9772581816. Its totient is φ = 3234091272.

The previous prime is 6491618533. The next prime is 6491618561. The reversal of 6491618542 is 2458161946.

It is a happy number.

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

It is a super-2 number, since 2×6491618542² = 84282222589676411528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6491618492 and 6491618501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5858308 + ... + 5859415.

It is an arithmetic number, because the mean of its divisors is an integer number (1221572727).

Almost surely, 2^6491618542 is an apocalyptic number.

6491618542 is a deficient number, since it is larger than the sum of its proper divisors (3280963274).

6491618542 is a wasteful number, since it uses less digits than its factorization.

6491618542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11718002.

The product of its digits is 414720, while the sum is 46.

The square root of 6491618542 is about 80570.5811199100. The cubic root of 6491618542 is about 1865.4530824721.

The spelling of 6491618542 in words is "six billion, four hundred ninety-one million, six hundred eighteen thousand, five hundred forty-two".