1771140761391 has 16 divisors (see below), whose sum is σ = 2363809410144. Its totient is φ = 1179616833024.

The previous prime is 1771140761363. The next prime is 1771140761431. The reversal of 1771140761391 is 1931670411771.

It is not a de Polignac number, because 1771140761391 - 2²³ = 1771132372783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1771140761391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1771140761491) 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, 13967611 + ... + 14093843.

It is an arithmetic number, because the mean of its divisors is an integer number (147738088134).

Almost surely, 2^{1771140761391} is an apocalyptic number.

1771140761391 is a deficient number, since it is larger than the sum of its proper divisors (592668648753).

1771140761391 is a wasteful number, since it uses less digits than its factorization.

1771140761391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130730.

The product of its (nonzero) digits is 222264, while the sum is 48.

The spelling of 1771140761391 in words is "one trillion, seven hundred seventy-one billion, one hundred forty million, seven hundred sixty-one thousand, three hundred ninety-one".