613623640 has 32 divisors (see below), whose sum is σ = 1577890080. Its totient is φ = 210385152.

The previous prime is 613623617. The next prime is 613623643. The reversal of 613623640 is 46326316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613623643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095477 + ... + 1096036.

It is an arithmetic number, because the mean of its divisors is an integer number (49309065).

Almost surely, 2^613623640 is an apocalyptic number.

It is an amenable number.

613623640 is an abundant number, since it is smaller than the sum of its proper divisors (964266440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613623640 is a wasteful number, since it uses less digits than its factorization.

613623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191531 (or 2191527 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 613623640 is about 24771.4278958642. The cubic root of 613623640 is about 849.7686290678.

Adding to 613623640 its reverse (46326316), we get a palindrome (659949956).

The spelling of 613623640 in words is "six hundred thirteen million, six hundred twenty-three thousand, six hundred forty".