7721135045 has 8 divisors (see below), whose sum is σ = 9978082296. Its totient is φ = 5701761216.

The previous prime is 7721135011. The next prime is 7721135117. The reversal of 7721135045 is 5405311277.

It can be written as a sum of positive squares in 4 ways, for example, as 128278276 + 7592856769 = 11326^2 + 87137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7721135045 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7721134996 and 7721135014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59393282 + ... + 59393411.

It is an arithmetic number, because the mean of its divisors is an integer number (1247260287).

Almost surely, 2^7721135045 is an apocalyptic number.

It is an amenable number.

7721135045 is a deficient number, since it is larger than the sum of its proper divisors (2256947251).

7721135045 is a wasteful number, since it uses less digits than its factorization.

7721135045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118786711.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 7721135045 is about 87869.9894446335. The cubic root of 7721135045 is about 1976.4858802770.

The spelling of 7721135045 in words is "seven billion, seven hundred twenty-one million, one hundred thirty-five thousand, forty-five".