612243651601 has 16 divisors (see below), whose sum is σ = 625207298128. Its totient is φ = 599411404800.

The previous prime is 612243651587. The next prime is 612243651619. The reversal of 612243651601 is 106156342216.

It is a Cunningham number, because it is equal to 782460²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 12859560000 + 599384091601 = 113400^2 + 774199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612243651601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612243651671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11675521 + ... + 11727841.

It is an arithmetic number, because the mean of its divisors is an integer number (39075456133).

Almost surely, 2^612243651601 is an apocalyptic number.

It is an amenable number.

612243651601 is a deficient number, since it is larger than the sum of its proper divisors (12963646527).

612243651601 is a wasteful number, since it uses less digits than its factorization.

612243651601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53572.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 612243651601 its reverse (106156342216), we get a palindrome (718399993817).

The spelling of 612243651601 in words is "six hundred twelve billion, two hundred forty-three million, six hundred fifty-one thousand, six hundred one".