55780530945 has 16 divisors (see below), whose sum is σ = 89272445760. Its totient is φ = 29741751104.

The previous prime is 55780530943. The next prime is 55780531033. The reversal of 55780530945 is 54903508755.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55780530945 - 2¹ = 55780530943 is a prime.

It is a super-2 number, since 2×55780530945² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55780530943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432735 + ... + 546644.

It is an arithmetic number, because the mean of its divisors is an integer number (5579527860).

Almost surely, 2^55780530945 is an apocalyptic number.

It is an amenable number.

55780530945 is a deficient number, since it is larger than the sum of its proper divisors (33491914815).

55780530945 is a wasteful number, since it uses less digits than its factorization.

55780530945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983184.

The product of its (nonzero) digits is 3780000, while the sum is 51.

The spelling of 55780530945 in words is "fifty-five billion, seven hundred eighty million, five hundred thirty thousand, nine hundred forty-five".