55518167554 has 24 divisors (see below), whose sum is σ = 88518259620. Its totient is φ = 26115205248.

The previous prime is 55518167519. The next prime is 55518167591. The reversal of 55518167554 is 45576181555.

It can be written as a sum of positive squares in 6 ways, for example, as 24725990025 + 30792177529 = 157245^2 + 175477^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23355214 + ... + 23357590.

Almost surely, 2^55518167554 is an apocalyptic number.

55518167554 is a deficient number, since it is larger than the sum of its proper divisors (33000092066).

55518167554 is an frugal number, since it uses more digits than its factorization.

55518167554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807 (or 2396 counting only the distinct ones).

The product of its digits is 4200000, while the sum is 52.

The spelling of 55518167554 in words is "fifty-five billion, five hundred eighteen million, one hundred sixty-seven thousand, five hundred fifty-four".