1961991200877 has 16 divisors (see below), whose sum is σ = 2753780928960. Its totient is φ = 1239103256832.

The previous prime is 1961991200833. The next prime is 1961991200893. The reversal of 1961991200877 is 7780021991691.

It is not a de Polignac number, because 1961991200877 - 2¹⁴ = 1961991184493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1961991200877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961991200077) 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, 797973 + ... + 2135589.

It is an arithmetic number, because the mean of its divisors is an integer number (172111308060).

Almost surely, 2^{1961991200877} is an apocalyptic number.

It is an amenable number.

1961991200877 is a deficient number, since it is larger than the sum of its proper divisors (791789728083).

1961991200877 is a wasteful number, since it uses less digits than its factorization.

1961991200877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363372.

The product of its (nonzero) digits is 3429216, while the sum is 60.

The spelling of 1961991200877 in words is "one trillion, nine hundred sixty-one billion, nine hundred ninety-one million, two hundred thousand, eight hundred seventy-seven".