7261561356 has 96 divisors (see below), whose sum is σ = 20528266752. Its totient is φ = 1950305280.

The previous prime is 7261561319. The next prime is 7261561381. The reversal of 7261561356 is 6531651627.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1383970 + ... + 1389206.

It is an arithmetic number, because the mean of its divisors is an integer number (213836112).

Almost surely, 2^7261561356 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 7261561356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10264133376).

7261561356 is an abundant number, since it is smaller than the sum of its proper divisors (13266705396).

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

7261561356 is a wasteful number, since it uses less digits than its factorization.

7261561356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6239 (or 6237 counting only the distinct ones).

The product of its digits is 226800, while the sum is 42.

The square root of 7261561356 is about 85214.7954054928. The cubic root of 7261561356 is about 1936.4665689437.

The spelling of 7261561356 in words is "seven billion, two hundred sixty-one million, five hundred sixty-one thousand, three hundred fifty-six".