612923650521 has 48 divisors (see below), whose sum is σ = 1024248960000. Its totient is φ = 323153736192.

The previous prime is 612923650501. The next prime is 612923650531. The reversal of 612923650521 is 125056329216.

It is a happy number.

612923650521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 612923650521 - 2⁶ = 612923650457 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (612923650501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4207105 + ... + 4350353.

It is an arithmetic number, because the mean of its divisors is an integer number (21338520000).

Almost surely, 2^612923650521 is an apocalyptic number.

It is an amenable number.

612923650521 is a deficient number, since it is larger than the sum of its proper divisors (411325309479).

612923650521 is a wasteful number, since it uses less digits than its factorization.

612923650521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145518 (or 145511 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

Adding to 612923650521 its reverse (125056329216), we get a palindrome (737979979737).

The spelling of 612923650521 in words is "six hundred twelve billion, nine hundred twenty-three million, six hundred fifty thousand, five hundred twenty-one".