3061721516 has 48 divisors (see below), whose sum is σ = 6438546240. Its totient is φ = 1246129920.

The previous prime is 3061721497. The next prime is 3061721549. The reversal of 3061721516 is 6151271603.

It is a super-4 number, since 4×3061721516⁴ (a number of 39 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18626 + ... + 80438.

It is an arithmetic number, because the mean of its divisors is an integer number (134136380).

Almost surely, 2^3061721516 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 3061721516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3219273120).

3061721516 is an abundant number, since it is smaller than the sum of its proper divisors (3376824724).

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

3061721516 is a wasteful number, since it uses less digits than its factorization.

3061721516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61914 (or 61912 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 3061721516 is about 55332.8249414396. The cubic root of 3061721516 is about 1452.0733740719.

The spelling of 3061721516 in words is "three billion, sixty-one million, seven hundred twenty-one thousand, five hundred sixteen".