65544738 has 16 divisors (see below), whose sum is σ = 149816640. Its totient is φ = 18727056.

The previous prime is 65544701. The next prime is 65544749. The reversal of 65544738 is 83744556.

It is a super-2 number, since 2×65544738² = 8592225358977288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1560589 = 65544738 / (6 + 5 + 5 + 4 + 4 + 7 + 3 + 8).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 65544738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780253 + ... + 780336.

It is an arithmetic number, because the mean of its divisors is an integer number (9363540).

Almost surely, 2^65544738 is an apocalyptic number.

65544738 is an abundant number, since it is smaller than the sum of its proper divisors (84271902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65544738 is a wasteful number, since it uses less digits than its factorization.

65544738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560601.

The product of its digits is 403200, while the sum is 42.

The square root of 65544738 is about 8095.9704791952. The cubic root of 65544738 is about 403.1926537738.

The spelling of 65544738 in words is "sixty-five million, five hundred forty-four thousand, seven hundred thirty-eight".