1345811819761 has 16 divisors (see below), whose sum is σ = 1360598342400. Its totient is φ = 1331072051328.

The previous prime is 1345811819743. The next prime is 1345811819777. The reversal of 1345811819761 is 1679181185431.

It is a cyclic number.

It is not a de Polignac number, because 1345811819761 - 2⁹ = 1345811819249 is a prime.

It is a super-2 number, since 2×1345811819761² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1345811813761) 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, 154349560 + ... + 154358278.

It is an arithmetic number, because the mean of its divisors is an integer number (85037396400).

Almost surely, 2^{1345811819761} is an apocalyptic number.

It is an amenable number.

1345811819761 is a deficient number, since it is larger than the sum of its proper divisors (14786522639).

1345811819761 is a wasteful number, since it uses less digits than its factorization.

1345811819761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11208.

The product of its digits is 1451520, while the sum is 55.

The spelling of 1345811819761 in words is "one trillion, three hundred forty-five billion, eight hundred eleven million, eight hundred nineteen thousand, seven hundred sixty-one".