1990155010055 has 16 divisors (see below), whose sum is σ = 2403991488000. Its totient is φ = 1581612389280.

The previous prime is 1990155010043. The next prime is 1990155010069. The reversal of 1990155010055 is 5500105510991.

It is a de Polignac number, because none of the positive numbers 2^k-1990155010055 is a prime.

It is a super-2 number, since 2×1990155010055² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1990155009994 and 1990155010021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957065 + ... + 2212754.

It is an arithmetic number, because the mean of its divisors is an integer number (150249468000).

Almost surely, 2^{1990155010055} is an apocalyptic number.

1990155010055 is a deficient number, since it is larger than the sum of its proper divisors (413836477945).

1990155010055 is a wasteful number, since it uses less digits than its factorization.

1990155010055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170654.

The product of its (nonzero) digits is 50625, while the sum is 41.

The spelling of 1990155010055 in words is "one trillion, nine hundred ninety billion, one hundred fifty-five million, ten thousand, fifty-five".