11990534977 has 8 divisors (see below), whose sum is σ = 12324890664. Its totient is φ = 11660183808.

The previous prime is 11990534971. The next prime is 11990535019. The reversal of 11990534977 is 77943509911.

It can be written as a sum of positive squares in 4 ways, for example, as 1255710096 + 10734824881 = 35436^2 + 103609^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11990534977 - 2⁷ = 11990534849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11990534971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995058 + ... + 1007035.

It is an arithmetic number, because the mean of its divisors is an integer number (1540611333).

Almost surely, 2^11990534977 is an apocalyptic number.

It is an amenable number.

11990534977 is a deficient number, since it is larger than the sum of its proper divisors (334355687).

11990534977 is a wasteful number, since it uses less digits than its factorization.

11990534977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002259.

The product of its (nonzero) digits is 2143260, while the sum is 55.

The spelling of 11990534977 in words is "eleven billion, nine hundred ninety million, five hundred thirty-four thousand, nine hundred seventy-seven".