11621103777 has 20 divisors (see below), whose sum is σ = 17687472660. Its totient is φ = 7601222304.

The previous prime is 11621103749. The next prime is 11621103787. The reversal of 11621103777 is 77730112611.

11621103777 is a `hidden beast` number, since 11 + 621 + 10 + 3 + 7 + 7 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3879919521 + 7741184256 = 62289^2 + 87984^2 .

It is not a de Polignac number, because 11621103777 - 2⁸ = 11621103521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11621103787) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1349202 + ... + 1357787.

It is an arithmetic number, because the mean of its divisors is an integer number (884373633).

Almost surely, 2^11621103777 is an apocalyptic number.

It is an amenable number.

11621103777 is a deficient number, since it is larger than the sum of its proper divisors (6066368883).

11621103777 is an equidigital number, since it uses as much as digits as its factorization.

11621103777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707054 (or 2707045 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 36.

The spelling of 11621103777 in words is "eleven billion, six hundred twenty-one million, one hundred three thousand, seven hundred seventy-seven".