1961919202287 has 16 divisors (see below), whose sum is σ = 2853724256640. Its totient is φ = 1189032108000.

The previous prime is 1961919202273. The next prime is 1961919202319. The reversal of 1961919202287 is 7822029191691.

It is not a de Polignac number, because 1961919202287 - 2³⁹ = 1412163388399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961919202687) 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, 6942912 + ... + 7219962.

It is an arithmetic number, because the mean of its divisors is an integer number (178357766040).

Almost surely, 2^{1961919202287} is an apocalyptic number.

1961919202287 is a deficient number, since it is larger than the sum of its proper divisors (891805054353).

1961919202287 is a wasteful number, since it uses less digits than its factorization.

1961919202287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491654.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The spelling of 1961919202287 in words is "one trillion, nine hundred sixty-one billion, nine hundred nineteen million, two hundred two thousand, two hundred eighty-seven".