2019677678538 has 16 divisors (see below), whose sum is σ = 4350075000096. Its totient is φ = 621439285680.

The previous prime is 2019677678533. The next prime is 2019677678539. The reversal of 2019677678538 is 8358767769102.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2019677678531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12946651708 + ... + 12946651863.

It is an arithmetic number, because the mean of its divisors is an integer number (271879687506).

Almost surely, 2^{2019677678538} is an apocalyptic number.

2019677678538 is an abundant number, since it is smaller than the sum of its proper divisors (2330397321558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2019677678538 is a wasteful number, since it uses less digits than its factorization.

2019677678538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25893303589.

The product of its (nonzero) digits is 213373440, while the sum is 69.

The spelling of 2019677678538 in words is "two trillion, nineteen billion, six hundred seventy-seven million, six hundred seventy-eight thousand, five hundred thirty-eight".