1877878591845 has 16 divisors (see below), whose sum is σ = 3034354321152. Its totient is φ = 991619057600.

The previous prime is 1877878591811. The next prime is 1877878591847. The reversal of 1877878591845 is 5481958787781.

It is not a de Polignac number, because 1877878591845 - 2⁶ = 1877878591781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1877878591847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619760397 + ... + 619763426.

It is an arithmetic number, because the mean of its divisors is an integer number (189647145072).

Almost surely, 2^{1877878591845} is an apocalyptic number.

1877878591845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1877878591845 is a deficient number, since it is larger than the sum of its proper divisors (1156475729307).

1877878591845 is a wasteful number, since it uses less digits than its factorization.

1877878591845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239523932.

The product of its digits is 1264435200, while the sum is 78.

The spelling of 1877878591845 in words is "one trillion, eight hundred seventy-seven billion, eight hundred seventy-eight million, five hundred ninety-one thousand, eight hundred forty-five".