611321537136 has 320 divisors, whose sum is σ = 1715189665280. Its totient is φ = 187042037760.

The previous prime is 611321537111. The next prime is 611321537143. The reversal of 611321537136 is 631735123116.

It is a junction number, because it is equal to n+sod(n) for n = 611321537094 and 611321537103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1168874571 + ... + 1168875093.

It is an arithmetic number, because the mean of its divisors is an integer number (5359967704).

Almost surely, 2^611321537136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611321537136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857594832640).

611321537136 is an abundant number, since it is smaller than the sum of its proper divisors (1103868128144).

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

611321537136 is a wasteful number, since it uses less digits than its factorization.

611321537136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 898 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The spelling of 611321537136 in words is "six hundred eleven billion, three hundred twenty-one million, five hundred thirty-seven thousand, one hundred thirty-six".