4057121749 has 4 divisors (see below), whose sum is σ = 4156075980. Its totient is φ = 3958167520.

The previous prime is 4057121713. The next prime is 4057121771. The reversal of 4057121749 is 9471217504.

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 60606225 + 3996515524 = 7785^2 + 63218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4057121749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4057121449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49477054 + ... + 49477135.

It is an arithmetic number, because the mean of its divisors is an integer number (1039018995).

Almost surely, 2^4057121749 is an apocalyptic number.

It is an amenable number.

4057121749 is a deficient number, since it is larger than the sum of its proper divisors (98954231).

4057121749 is an equidigital number, since it uses as much as digits as its factorization.

4057121749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98954230.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 4057121749 is about 63695.5394749114. The cubic root of 4057121749 is about 1594.9216261120.

The spelling of 4057121749 in words is "four billion, fifty-seven million, one hundred twenty-one thousand, seven hundred forty-nine".