612481681 has 8 divisors (see below), whose sum is σ = 700758080. Its totient is φ = 524400048.

The previous prime is 612481679. The next prime is 612481687. The reversal of 612481681 is 186184216.

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

It is a cyclic number.

It is not a de Polignac number, because 612481681 - 2¹ = 612481679 is a prime.

It is a super-2 number, since 2×612481681² = 750267619121171522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 612481681.

It is not an unprimeable number, because it can be changed into a prime (612481687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41886 + ... + 54583.

It is an arithmetic number, because the mean of its divisors is an integer number (87594760).

Almost surely, 2^612481681 is an apocalyptic number.

It is an amenable number.

612481681 is a deficient number, since it is larger than the sum of its proper divisors (88276399).

612481681 is an equidigital number, since it uses as much as digits as its factorization.

612481681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97383.

The product of its digits is 18432, while the sum is 37.

The square root of 612481681 is about 24748.3672390726. The cubic root of 612481681 is about 849.2411594221.

The spelling of 612481681 in words is "six hundred twelve million, four hundred eighty-one thousand, six hundred eighty-one".