1055401665550 has 12 divisors (see below), whose sum is σ = 1963047098016. Its totient is φ = 422160666200.

The previous prime is 1055401665547. The next prime is 1055401665581. The reversal of 1055401665550 is 555661045501.

It is a super-2 number, since 2×1055401665550² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1055401665497 and 1055401665506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10554016606 + ... + 10554016705.

It is an arithmetic number, because the mean of its divisors is an integer number (163587258168).

Almost surely, 2^{1055401665550} is an apocalyptic number.

1055401665550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1055401665550 is a deficient number, since it is larger than the sum of its proper divisors (907645432466).

1055401665550 is a wasteful number, since it uses less digits than its factorization.

1055401665550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21108033323 (or 21108033318 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 43.

The spelling of 1055401665550 in words is "one trillion, fifty-five billion, four hundred one million, six hundred sixty-five thousand, five hundred fifty".