612606534540 has 768 divisors, whose sum is σ = 2390541189120. Its totient is φ = 113067601920.

The previous prime is 612606534487. The next prime is 612606534557. The reversal of 612606534540 is 45435606216.

It is a super-2 number, since 2×612606534540² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 612606534492 and 612606534501.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 952731459 + ... + 952732101.

It is an arithmetic number, because the mean of its divisors is an integer number (3112683840).

Almost surely, 2^612606534540 is an apocalyptic number.

612606534540 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 612606534540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195270594560).

612606534540 is an abundant number, since it is smaller than the sum of its proper divisors (1777934654580).

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

612606534540 is a wasteful number, since it uses less digits than its factorization.

612606534540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1260 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 612606534540 in words is "six hundred twelve billion, six hundred six million, five hundred thirty-four thousand, five hundred forty".