49661865 has 48 divisors (see below), whose sum is σ = 96235776. Its totient is φ = 23481600.

The previous prime is 49661863. The next prime is 49661917. The reversal of 49661865 is 56816694.

It is not a de Polignac number, because 49661865 - 2¹ = 49661863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 49661865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49661863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19072 + ... + 21518.

It is an arithmetic number, because the mean of its divisors is an integer number (2004912).

Almost surely, 2^49661865 is an apocalyptic number.

49661865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49661865 is a deficient number, since it is larger than the sum of its proper divisors (46573911).

49661865 is a wasteful number, since it uses less digits than its factorization.

49661865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510 (or 2507 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 49661865 is about 7047.1174958276. The cubic root of 49661865 is about 367.5708040726.

The spelling of 49661865 in words is "forty-nine million, six hundred sixty-one thousand, eight hundred sixty-five".