4899121457 has 4 divisors (see below), whose sum is σ = 4924505700. Its totient is φ = 4873737216.

The previous prime is 4899121379. The next prime is 4899121459. The reversal of 4899121457 is 7541219984.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 564347536 + 4334773921 = 23756^2 + 65839^2 .

It is a cyclic number.

It is not a de Polignac number, because 4899121457 - 2¹⁴ = 4899105073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4899121459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12691832 + ... + 12692217.

It is an arithmetic number, because the mean of its divisors is an integer number (1231126425).

Almost surely, 2^4899121457 is an apocalyptic number.

It is an amenable number.

4899121457 is a deficient number, since it is larger than the sum of its proper divisors (25384243).

4899121457 is a wasteful number, since it uses less digits than its factorization.

4899121457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25384242.

The product of its digits is 725760, while the sum is 50.

The square root of 4899121457 is about 69993.7244115499. The cubic root of 4899121457 is about 1698.3977356555.

The spelling of 4899121457 in words is "four billion, eight hundred ninety-nine million, one hundred twenty-one thousand, four hundred fifty-seven".