1761125638491 has 6 divisors (see below), whose sum is σ = 2543848144500. Its totient is φ = 1174083758988.

The previous prime is 1761125638469. The next prime is 1761125638513. The reversal of 1761125638491 is 1948365211671.

1761125638491 is a `hidden beast` number, since 1 + 7 + 6 + 1 + 1 + 256 + 384 + 9 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1761125638469) and next prime (1761125638513).

It is not a de Polignac number, because 1761125638491 - 2⁶ = 1761125638427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1761125638891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97840313241 + ... + 97840313258.

It is an arithmetic number, because the mean of its divisors is an integer number (423974690750).

Almost surely, 2^{1761125638491} is an apocalyptic number.

1761125638491 is a deficient number, since it is larger than the sum of its proper divisors (782722506009).

1761125638491 is a wasteful number, since it uses less digits than its factorization.

1761125638491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195680626505 (or 195680626502 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The spelling of 1761125638491 in words is "one trillion, seven hundred sixty-one billion, one hundred twenty-five million, six hundred thirty-eight thousand, four hundred ninety-one".