612385250258881 has 4 divisors (see below), whose sum is σ = 668056636646064. Its totient is φ = 556713863871700.

The previous prime is 612385250258741. The next prime is 612385250259121. The reversal of 612385250258881 is 188852052583216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612385250258881 is a prime.

It is a super-2 number, since 2×612385250258881² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612385250258581) 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, 27835693193575 + ... + 27835693193596.

It is an arithmetic number, because the mean of its divisors is an integer number (167014159161516).

Almost surely, 2^{612385250258881} is an apocalyptic number.

It is an amenable number.

612385250258881 is a deficient number, since it is larger than the sum of its proper divisors (55671386387183).

612385250258881 is a wasteful number, since it uses less digits than its factorization.

612385250258881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55671386387182.

The product of its (nonzero) digits is 73728000, while the sum is 64.

The spelling of 612385250258881 in words is "six hundred twelve trillion, three hundred eighty-five billion, two hundred fifty million, two hundred fifty-eight thousand, eight hundred eighty-one".