1188062747661 has 4 divisors (see below), whose sum is σ = 1584083663552. Its totient is φ = 792041831772.

The previous prime is 1188062747629. The next prime is 1188062747699. The reversal of 1188062747661 is 1667472608811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1188062747661 - 2⁵ = 1188062747629 is a prime.

It is a super-2 number, since 2×1188062747661² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188062740661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198010457941 + ... + 198010457946.

It is an arithmetic number, because the mean of its divisors is an integer number (396020915888).

Almost surely, 2^{1188062747661} is an apocalyptic number.

It is an amenable number.

1188062747661 is a deficient number, since it is larger than the sum of its proper divisors (396020915891).

1188062747661 is an equidigital number, since it uses as much as digits as its factorization.

1188062747661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396020915890.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 1188062747661 in words is "one trillion, one hundred eighty-eight billion, sixty-two million, seven hundred forty-seven thousand, six hundred sixty-one".