611361520 has 160 divisors (see below), whose sum is σ = 1802313216. Its totient is φ = 187315200.

The previous prime is 611361503. The next prime is 611361523. The reversal of 611361520 is 25163116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611361523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374947 + ... + 376573.

Almost surely, 2^611361520 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 611361520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901156608).

611361520 is an abundant number, since it is smaller than the sum of its proper divisors (1190951696).

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

611361520 is a wasteful number, since it uses less digits than its factorization.

611361520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 611361520 is about 24725.7258740770. The cubic root of 611361520 is about 848.7231208813.

The spelling of 611361520 in words is "six hundred eleven million, three hundred sixty-one thousand, five hundred twenty".