55518078 has 48 divisors (see below), whose sum is σ = 140914944. Its totient is φ = 14419440.

The previous prime is 55518077. The next prime is 55518101. The reversal of 55518078 is 87081555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55518077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5350 + ... + 11817.

It is an arithmetic number, because the mean of its divisors is an integer number (2935728).

Almost surely, 2^55518078 is an apocalyptic number.

55518078 is an abundant number, since it is smaller than the sum of its proper divisors (85396866).

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

55518078 is a wasteful number, since it uses less digits than its factorization.

55518078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17197 (or 17190 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 39.

The square root of 55518078 is about 7451.0454300051. The cubic root of 55518078 is about 381.4855927000.

The spelling of 55518078 in words is "fifty-five million, five hundred eighteen thousand, seventy-eight".