2055981475538 has 4 divisors (see below), whose sum is σ = 3083972213310. Its totient is φ = 1027990737768.

The previous prime is 2055981475531. The next prime is 2055981475591. The reversal of 2055981475538 is 8355741895502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2004526450969 + 51455024569 = 1415813^2 + 226837^2 .

It is not an unprimeable number, because it can be changed into a prime (2055981475531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513995368883 + ... + 513995368886.

Almost surely, 2^{2055981475538} is an apocalyptic number.

2055981475538 is a deficient number, since it is larger than the sum of its proper divisors (1027990737772).

2055981475538 is a wasteful number, since it uses less digits than its factorization.

2055981475538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027990737771.

The product of its (nonzero) digits is 60480000, while the sum is 62.

The spelling of 2055981475538 in words is "two trillion, fifty-five billion, nine hundred eighty-one million, four hundred seventy-five thousand, five hundred thirty-eight".