4157721465 has 16 divisors (see below), whose sum is σ = 6656758848. Its totient is φ = 2215983296.

The previous prime is 4157721461. The next prime is 4157721517. The reversal of 4157721465 is 5641277514.

It is a cyclic number.

It is not a de Polignac number, because 4157721465 - 2² = 4157721461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4157721461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68154 + ... + 113843.

It is an arithmetic number, because the mean of its divisors is an integer number (416047428).

Almost surely, 2^4157721465 is an apocalyptic number.

It is an amenable number.

4157721465 is a deficient number, since it is larger than the sum of its proper divisors (2499037383).

4157721465 is a wasteful number, since it uses less digits than its factorization.

4157721465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183528.

The product of its digits is 235200, while the sum is 42.

The square root of 4157721465 is about 64480.3959742804. The cubic root of 4157721465 is about 1607.9966163359.

Adding to 4157721465 its reverse (5641277514), we get a palindrome (9798998979).

The spelling of 4157721465 in words is "four billion, one hundred fifty-seven million, seven hundred twenty-one thousand, four hundred sixty-five".