612722283840 has 392 divisors, whose sum is σ = 2190410928288. Its totient is φ = 163180293120.

The previous prime is 612722283809. The next prime is 612722283847. The reversal of 612722283840 is 48382227216.

612722283840 is a `hidden beast` number, since 61 + 272 + 2 + 283 + 8 + 40 = 666.

It is a super-2 number, since 2×612722283840² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612722283847) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 273169759 + ... + 273172001.

Almost surely, 2^612722283840 is an apocalyptic number.

612722283840 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 612722283840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1095205464144).

612722283840 is an abundant number, since it is smaller than the sum of its proper divisors (1577688644448).

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

612722283840 is a wasteful number, since it uses less digits than its factorization.

612722283840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449 (or 3424 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 612722283840 in words is "six hundred twelve billion, seven hundred twenty-two million, two hundred eighty-three thousand, eight hundred forty".