54640511 has 4 divisors (see below), whose sum is σ = 54918072. Its totient is φ = 54362952.

The previous prime is 54640471. The next prime is 54640519. The reversal of 54640511 is 11504645.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54640511 - 2¹⁴ = 54624127 is a prime.

It is a super-2 number, since 2×54640511² = 5971170884682242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54640519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138485 + ... + 138878.

It is an arithmetic number, because the mean of its divisors is an integer number (13729518).

Almost surely, 2^54640511 is an apocalyptic number.

54640511 is a deficient number, since it is larger than the sum of its proper divisors (277561).

54640511 is a wasteful number, since it uses less digits than its factorization.

54640511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277560.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 54640511 is about 7391.9220098700. The cubic root of 54640511 is about 379.4648769775.

The spelling of 54640511 in words is "fifty-four million, six hundred forty thousand, five hundred eleven".