55778523829 has 16 divisors (see below), whose sum is σ = 68874192000. Its totient is φ = 44997796032.

The previous prime is 55778523793. The next prime is 55778523847. The reversal of 55778523829 is 92832587755.

It is not a de Polignac number, because 55778523829 - 2¹⁷ = 55778392757 is a prime.

It is a super-2 number, since 2×55778523829² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55778523859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4777099 + ... + 4788760.

It is an arithmetic number, because the mean of its divisors is an integer number (4304637000).

Almost surely, 2^55778523829 is an apocalyptic number.

It is an amenable number.

55778523829 is a deficient number, since it is larger than the sum of its proper divisors (13095668171).

55778523829 is an equidigital number, since it uses as much as digits as its factorization.

55778523829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9565897 (or 9565883 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 61.

The spelling of 55778523829 in words is "fifty-five billion, seven hundred seventy-eight million, five hundred twenty-three thousand, eight hundred twenty-nine".