55780322535 has 24 divisors (see below), whose sum is σ = 110498163360. Its totient is φ = 25499575872.

The previous prime is 55780322527. The next prime is 55780322539. The reversal of 55780322535 is 53522308755.

It is a happy number.

55780322535 is a `hidden beast` number, since 5 + 5 + 7 + 80 + 32 + 2 + 535 = 666.

It is not a de Polignac number, because 55780322535 - 2³ = 55780322527 is a prime.

It is a super-2 number, since 2×55780322535² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780322539) 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, 88539880 + ... + 88540509.

It is an arithmetic number, because the mean of its divisors is an integer number (4604090140).

Almost surely, 2^55780322535 is an apocalyptic number.

55780322535 is a deficient number, since it is larger than the sum of its proper divisors (54717840825).

55780322535 is a wasteful number, since it uses less digits than its factorization.

55780322535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177080407 (or 177080404 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 45.

The spelling of 55780322535 in words is "fifty-five billion, seven hundred eighty million, three hundred twenty-two thousand, five hundred thirty-five".