1373555550 has 48 divisors (see below), whose sum is σ = 3408732720. Its totient is φ = 366032640.

The previous prime is 1373555549. The next prime is 1373555587. The reversal of 1373555550 is 555553731.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1373555499 and 1373555508.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 356434 + ... + 360266.

It is an arithmetic number, because the mean of its divisors is an integer number (71015265).

Almost surely, 2^1373555550 is an apocalyptic number.

1373555550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1373555550 is an abundant number, since it is smaller than the sum of its proper divisors (2035177170).

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

1373555550 is a wasteful number, since it uses less digits than its factorization.

1373555550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6237 (or 6232 counting only the distinct ones).

The product of its (nonzero) digits is 196875, while the sum is 39.

The square root of 1373555550 is about 37061.5103577822. The cubic root of 1373555550 is about 1111.6005236369.

The spelling of 1373555550 in words is "one billion, three hundred seventy-three million, five hundred fifty-five thousand, five hundred fifty".