54638691 has 16 divisors (see below), whose sum is σ = 75586560. Its totient is φ = 35081280.

The previous prime is 54638687. The next prime is 54638693. The reversal of 54638691 is 19683645.

It is not a de Polignac number, because 54638691 - 2² = 54638687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54638693) 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, 6906 + ... + 12528.

It is an arithmetic number, because the mean of its divisors is an integer number (4724160).

Almost surely, 2^54638691 is an apocalyptic number.

54638691 is a deficient number, since it is larger than the sum of its proper divisors (20947869).

54638691 is a wasteful number, since it uses less digits than its factorization.

54638691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5746.

The product of its digits is 155520, while the sum is 42.

The square root of 54638691 is about 7391.7989014853. The cubic root of 54638691 is about 379.4606637803.

The spelling of 54638691 in words is "fifty-four million, six hundred thirty-eight thousand, six hundred ninety-one".