6640136233502 has 8 divisors (see below), whose sum is σ = 10229399062536. Its totient is φ = 3230336545992.

The previous prime is 6640136233501. The next prime is 6640136233517. The reversal of 6640136233502 is 2053326310466.

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

It is a super-2 number, since 2×6640136233502² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6640136233502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640136233501) 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, 44865785288 + ... + 44865785435.

It is an arithmetic number, because the mean of its divisors is an integer number (1278674882817).

Almost surely, 2^{6640136233502} is an apocalyptic number.

6640136233502 is a deficient number, since it is larger than the sum of its proper divisors (3589262829034).

6640136233502 is a wasteful number, since it uses less digits than its factorization.

6640136233502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89731570762.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 6640136233502 in words is "six trillion, six hundred forty billion, one hundred thirty-six million, two hundred thirty-three thousand, five hundred two".