613121402255400 has 576 divisors, whose sum is σ = 2106568340997120. Its totient is φ = 159739657113600.

The previous prime is 613121402255393. The next prime is 613121402255431. The reversal of 613121402255400 is 4552204121316.

613121402255400 is a `hidden beast` number, since 6 + 1 + 3 + 1 + 21 + 4 + 0 + 225 + 5 + 400 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 157980261460 + ... + 157980265340.

It is an arithmetic number, because the mean of its divisors is an integer number (3657236703120).

Almost surely, 2^{613121402255400} is an apocalyptic number.

613121402255400 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 613121402255400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053284170498560).

613121402255400 is an abundant number, since it is smaller than the sum of its proper divisors (1493446938741720).

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

613121402255400 is a wasteful number, since it uses less digits than its factorization.

613121402255400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6746 (or 6734 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 613121402255400 its reverse (4552204121316), we get a palindrome (617673606376716).

The spelling of 613121402255400 in words is "six hundred thirteen trillion, one hundred twenty-one billion, four hundred two million, two hundred fifty-five thousand, four hundred".