55510531540 has 24 divisors (see below), whose sum is σ = 120591845640. Its totient is φ = 21438549888.

The previous prime is 55510531519. The next prime is 55510531543. The reversal of 55510531540 is 4513501555.

It can be written as a sum of positive squares in 4 ways, for example, as 148206276 + 55362325264 = 12174^2 + 235292^2 .

It is a super-2 number, since 2×55510531540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55510531496 and 55510531505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55510531543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47853327 + ... + 47854486.

It is an arithmetic number, because the mean of its divisors is an integer number (5024660235).

Almost surely, 2^55510531540 is an apocalyptic number.

It is an amenable number.

55510531540 is an abundant number, since it is smaller than the sum of its proper divisors (65081314100).

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

55510531540 is a wasteful number, since it uses less digits than its factorization.

55510531540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95707851 (or 95707849 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 55510531540 in words is "fifty-five billion, five hundred ten million, five hundred thirty-one thousand, five hundred forty".