49409815857 has 8 divisors (see below), whose sum is σ = 66000194976. Its totient is φ = 32879656992.

The previous prime is 49409815831. The next prime is 49409815879. The reversal of 49409815857 is 75851890494.

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

It is not a de Polignac number, because 49409815857 - 2⁷ = 49409815729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49409815857.

It is not an unprimeable number, because it can be changed into a prime (49409815817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15053148 + ... + 15056429.

It is an arithmetic number, because the mean of its divisors is an integer number (8250024372).

Almost surely, 2^49409815857 is an apocalyptic number.

It is an amenable number.

49409815857 is a deficient number, since it is larger than the sum of its proper divisors (16590379119).

49409815857 is a wasteful number, since it uses less digits than its factorization.

49409815857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30110127.

The product of its (nonzero) digits is 14515200, while the sum is 60.

The spelling of 49409815857 in words is "forty-nine billion, four hundred nine million, eight hundred fifteen thousand, eight hundred fifty-seven".