1655000111381 has 4 divisors (see below), whose sum is σ = 1658840019264. Its totient is φ = 1651160203500.

The previous prime is 1655000111371. The next prime is 1655000111431. The reversal of 1655000111381 is 1831110005561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1655000111381 - 2³⁴ = 1637820242197 is a prime.

It is a super-2 number, since 2×1655000111381² (a number of 25 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 (1655000111311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1919953295 + ... + 1919954156.

It is an arithmetic number, because the mean of its divisors is an integer number (414710004816).

Almost surely, 2^{1655000111381} is an apocalyptic number.

It is an amenable number.

1655000111381 is a deficient number, since it is larger than the sum of its proper divisors (3839907883).

1655000111381 is an equidigital number, since it uses as much as digits as its factorization.

1655000111381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839907882.

The product of its (nonzero) digits is 3600, while the sum is 32.

The spelling of 1655000111381 in words is "one trillion, six hundred fifty-five billion, one hundred eleven thousand, three hundred eighty-one".