11945677887505 has 8 divisors (see below), whose sum is σ = 14335399160424. Its totient is φ = 9556151846400.

The previous prime is 11945677887491. The next prime is 11945677887547. The reversal of 11945677887505 is 50578877654911.

It is a Cunningham number, because it is equal to 3456252²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 11945677887504 = 1^2 + 3456252^2 .

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

It is not a de Polignac number, because 11945677887505 - 2²¹ = 11945675790353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48673306 + ... + 48918115.

It is an arithmetic number, because the mean of its divisors is an integer number (1791924895053).

Almost surely, 2^{11945677887505} is an apocalyptic number.

It is an amenable number.

11945677887505 is a deficient number, since it is larger than the sum of its proper divisors (2389721272919).

11945677887505 is an equidigital number, since it uses as much as digits as its factorization.

11945677887505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97615907.

The product of its (nonzero) digits is 592704000, while the sum is 73.

The spelling of 11945677887505 in words is "eleven trillion, nine hundred forty-five billion, six hundred seventy-seven million, eight hundred eighty-seven thousand, five hundred five".