5721378506 has 24 divisors (see below), whose sum is σ = 8937787404. Its totient is φ = 2746638720.

The previous prime is 5721378469. The next prime is 5721378511. The reversal of 5721378506 is 6058731275.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1766100625 + 3955277881 = 42025^2 + 62891^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295046 + ... + 313838.

Almost surely, 2^5721378506 is an apocalyptic number.

5721378506 is a deficient number, since it is larger than the sum of its proper divisors (3216408898).

5721378506 is a wasteful number, since it uses less digits than its factorization.

5721378506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19034 (or 19005 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 5721378506 is about 75639.7944603236. The cubic root of 5721378506 is about 1788.5464627085.

The spelling of 5721378506 in words is "five billion, seven hundred twenty-one million, three hundred seventy-eight thousand, five hundred six".