6742137656 has 8 divisors (see below), whose sum is σ = 12641508120. Its totient is φ = 3371068824.

The previous prime is 6742137643. The next prime is 6742137671. The reversal of 6742137656 is 6567312476.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 6742137656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421383596 + ... + 421383611.

It is an arithmetic number, because the mean of its divisors is an integer number (1580188515).

Almost surely, 2^6742137656 is an apocalyptic number.

It is an amenable number.

6742137656 is a deficient number, since it is larger than the sum of its proper divisors (5899370464).

6742137656 is a wasteful number, since it uses less digits than its factorization.

6742137656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842767213 (or 842767209 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 47.

The square root of 6742137656 is about 82110.5209823930. The cubic root of 6742137656 is about 1889.1475169672.

The spelling of 6742137656 in words is "six billion, seven hundred forty-two million, one hundred thirty-seven thousand, six hundred fifty-six".