1961754077291 has 8 divisors (see below), whose sum is σ = 2004012347904. Its totient is φ = 1919517424360.

The previous prime is 1961754077243. The next prime is 1961754077323. The reversal of 1961754077291 is 1927704571691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1961754077291 - 2¹⁴ = 1961754060907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961754077291.

It is not an unprimeable number, because it can be changed into a prime (1961754077791) 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, 5220905 + ... + 5584026.

It is an arithmetic number, because the mean of its divisors is an integer number (250501543488).

Almost surely, 2^{1961754077291} is an apocalyptic number.

1961754077291 is a deficient number, since it is larger than the sum of its proper divisors (42258270613).

1961754077291 is a wasteful number, since it uses less digits than its factorization.

1961754077291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10808841.

The product of its (nonzero) digits is 6667920, while the sum is 59.

The spelling of 1961754077291 in words is "one trillion, nine hundred sixty-one billion, seven hundred fifty-four million, seventy-seven thousand, two hundred ninety-one".