55550302778 has 16 divisors (see below), whose sum is σ = 86445765000. Its totient is φ = 26740537152.

The previous prime is 55550302741. The next prime is 55550302783. The reversal of 55550302778 is 87720305555.

It can be written as a sum of positive squares in 4 ways, for example, as 55339269049 + 211033729 = 235243^2 + 14527^2 .

It is a super-2 number, since 2×55550302778² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351913 + ... + 1392396.

Almost surely, 2^55550302778 is an apocalyptic number.

55550302778 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55550302778 is a deficient number, since it is larger than the sum of its proper divisors (30895462222).

55550302778 is a wasteful number, since it uses less digits than its factorization.

55550302778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744689.

The product of its (nonzero) digits is 1470000, while the sum is 47.

The spelling of 55550302778 in words is "fifty-five billion, five hundred fifty million, three hundred two thousand, seven hundred seventy-eight".