49661815 has 16 divisors (see below), whose sum is σ = 68611392. Its totient is φ = 33801984.

The previous prime is 49661791. The next prime is 49661837. The reversal of 49661815 is 51816694.

It is a cyclic number.

It is not a de Polignac number, because 49661815 - 2¹¹ = 49659767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384 + ... + 9973.

It is an arithmetic number, because the mean of its divisors is an integer number (4288212).

Almost surely, 2^49661815 is an apocalyptic number.

49661815 is a deficient number, since it is larger than the sum of its proper divisors (18949577).

49661815 is a wasteful number, since it uses less digits than its factorization.

49661815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10506.

The product of its digits is 51840, while the sum is 40.

The square root of 49661815 is about 7047.1139482770. The cubic root of 49661815 is about 367.5706807147.

The spelling of 49661815 in words is "forty-nine million, six hundred sixty-one thousand, eight hundred fifteen".