1878538864955 has 4 divisors (see below), whose sum is σ = 2254246637952. Its totient is φ = 1502831091960.

The previous prime is 1878538864933. The next prime is 1878538864967. The reversal of 1878538864955 is 5594688358781.

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

It is not a de Polignac number, because 1878538864955 - 2⁴⁰ = 779027237179 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187853886491 + ... + 187853886500.

It is an arithmetic number, because the mean of its divisors is an integer number (563561659488).

Almost surely, 2^{1878538864955} is an apocalyptic number.

1878538864955 is a deficient number, since it is larger than the sum of its proper divisors (375707772997).

1878538864955 is an equidigital number, since it uses as much as digits as its factorization.

1878538864955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375707772996.

The product of its digits is 2322432000, while the sum is 77.

The spelling of 1878538864955 in words is "one trillion, eight hundred seventy-eight billion, five hundred thirty-eight million, eight hundred sixty-four thousand, nine hundred fifty-five".