7661097312 has 384 divisors, whose sum is σ = 24182323200. Its totient is φ = 2098483200.

The previous prime is 7661097281. The next prime is 7661097319. The reversal of 7661097312 is 2137901667.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7661097319) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55115739 + ... + 55115877.

It is an arithmetic number, because the mean of its divisors is an integer number (62974800).

Almost surely, 2^7661097312 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 7661097312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12091161600).

7661097312 is an abundant number, since it is smaller than the sum of its proper divisors (16521225888).

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

7661097312 is a wasteful number, since it uses less digits than its factorization.

7661097312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 7661097312 is about 87527.6945429274. The cubic root of 7661097312 is about 1971.3496477781.

Adding to 7661097312 its reverse (2137901667), we get a palindrome (9798998979).

The spelling of 7661097312 in words is "seven billion, six hundred sixty-one million, ninety-seven thousand, three hundred twelve".