49511661 has 16 divisors (see below), whose sum is σ = 68308800. Its totient is φ = 31874688.

The previous prime is 49511653. The next prime is 49511669. The reversal of 49511661 is 16611594.

It is an interprime number because it is at equal distance from previous prime (49511653) and next prime (49511669).

It is not a de Polignac number, because 49511661 - 2³ = 49511653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49511669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13825 + ... + 17033.

It is an arithmetic number, because the mean of its divisors is an integer number (4269300).

Almost surely, 2^49511661 is an apocalyptic number.

It is an amenable number.

49511661 is a deficient number, since it is larger than the sum of its proper divisors (18797139).

49511661 is a wasteful number, since it uses less digits than its factorization.

49511661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388.

The product of its digits is 6480, while the sum is 33.

The square root of 49511661 is about 7036.4523021193. The cubic root of 49511661 is about 367.1998530360.

The spelling of 49511661 in words is "forty-nine million, five hundred eleven thousand, six hundred sixty-one".