613611351540 has 72 divisors (see below), whose sum is σ = 2030495751648. Its totient is φ = 148754266560.

The previous prime is 613611351517. The next prime is 613611351553. The reversal of 613611351540 is 45153116316.

613611351540 is a `hidden beast` number, since 6 + 1 + 3 + 61 + 1 + 3 + 51 + 540 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 613611351495 and 613611351504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154950382 + ... + 154954341.

It is an arithmetic number, because the mean of its divisors is an integer number (28201329884).

Almost surely, 2^613611351540 is an apocalyptic number.

613611351540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

613611351540 is an abundant number, since it is smaller than the sum of its proper divisors (1416884400108).

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

613611351540 is a wasteful number, since it uses less digits than its factorization.

613611351540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309904749 (or 309904744 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Adding to 613611351540 its reverse (45153116316), we get a palindrome (658764467856).

The spelling of 613611351540 in words is "six hundred thirteen billion, six hundred eleven million, three hundred fifty-one thousand, five hundred forty".