615266561560 has 144 divisors (see below), whose sum is σ = 1710667242000. Its totient is φ = 198539615232.

The previous prime is 615266561557. The next prime is 615266561561. The reversal of 615266561560 is 65165662516.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615266561561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23341 + ... + 1109539.

It is an arithmetic number, because the mean of its divisors is an integer number (11879633625).

Almost surely, 2^615266561560 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 615266561560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855333621000).

615266561560 is an abundant number, since it is smaller than the sum of its proper divisors (1095400680440).

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

615266561560 is a wasteful number, since it uses less digits than its factorization.

615266561560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086258 (or 1086230 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 615266561560 in words is "six hundred fifteen billion, two hundred sixty-six million, five hundred sixty-one thousand, five hundred sixty".