7721261496 has 240 divisors, whose sum is σ = 24590273400. Its totient is φ = 2249845632.

The previous prime is 7721261489. The next prime is 7721261507. The reversal of 7721261496 is 6941621277.

7721261496 is a `hidden beast` number, since 7 + 7 + 21 + 2 + 614 + 9 + 6 = 666.

It is a super-2 number, since 2×7721261496² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3039795 + ... + 3042333.

Almost surely, 2^7721261496 is an apocalyptic number.

7721261496 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7721261496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12295136700).

7721261496 is an abundant number, since it is smaller than the sum of its proper divisors (16869011904).

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

7721261496 is a wasteful number, since it uses less digits than its factorization.

7721261496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608 (or 2576 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 7721261496 is about 87870.7089763136. The cubic root of 7721261496 is about 1976.4966700227.

The spelling of 7721261496 in words is "seven billion, seven hundred twenty-one million, two hundred sixty-one thousand, four hundred ninety-six".