1761383820961 has 16 divisors (see below), whose sum is σ = 1787768841600. Its totient is φ = 1735148815488.

The previous prime is 1761383820943. The next prime is 1761383820979. The reversal of 1761383820961 is 1690283831671.

It is an interprime number because it is at equal distance from previous prime (1761383820943) and next prime (1761383820979).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1761383820961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1761383820901) 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, 117834490 + ... + 117849436.

It is an arithmetic number, because the mean of its divisors is an integer number (111735552600).

Almost surely, 2^{1761383820961} is an apocalyptic number.

It is an amenable number.

1761383820961 is a deficient number, since it is larger than the sum of its proper divisors (26385020639).

1761383820961 is a wasteful number, since it uses less digits than its factorization.

1761383820961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19848.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 1761383820961 in words is "one trillion, seven hundred sixty-one billion, three hundred eighty-three million, eight hundred twenty thousand, nine hundred sixty-one".