612463680 has 140 divisors (see below), whose sum is σ = 2178733260. Its totient is φ = 163316736.

The previous prime is 612463669. The next prime is 612463681. The reversal of 612463680 is 86364216.

612463680 is a `hidden beast` number, since 6 + 12 + 4 + 636 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 84934656 + 527529024 = 9216^2 + 22968^2 .

It is a super-2 number, since 2×612463680² = 750223518638284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (612463681) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14106 + ... + 37734.

Almost surely, 2^612463680 is an apocalyptic number.

612463680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612463680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089366630).

612463680 is an abundant number, since it is smaller than the sum of its proper divisors (1566269580).

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

612463680 is a wasteful number, since it uses less digits than its factorization.

612463680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23658 (or 23639 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 612463680 is about 24748.0035558426. The cubic root of 612463680 is about 849.2328395325.

The spelling of 612463680 in words is "six hundred twelve million, four hundred sixty-three thousand, six hundred eighty".