49040004869 has 4 divisors (see below), whose sum is σ = 50365410444. Its totient is φ = 47714599296.

The previous prime is 49040004863. The next prime is 49040004887. The reversal of 49040004869 is 96840004094.

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 40332688900 + 8707315969 = 200830^2 + 93313^2 .

It is a cyclic number.

It is not a de Polignac number, because 49040004869 - 2⁸ = 49040004613 is a prime.

It is a super-2 number, since 2×49040004869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49040004863) 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, 662702732 + ... + 662702805.

It is an arithmetic number, because the mean of its divisors is an integer number (12591352611).

Almost surely, 2^49040004869 is an apocalyptic number.

It is an amenable number.

49040004869 is a deficient number, since it is larger than the sum of its proper divisors (1325405575).

49040004869 is a wasteful number, since it uses less digits than its factorization.

49040004869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325405574.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 49040004869 in words is "forty-nine billion, forty million, four thousand, eight hundred sixty-nine".