11987357890 has 16 divisors (see below), whose sum is σ = 21584911608. Its totient is φ = 4793239296.

The previous prime is 11987357881. The next prime is 11987357891. The reversal of 11987357890 is 9875378911.

It can be written as a sum of positive squares in 4 ways, for example, as 9789717249 + 2197640641 = 98943^2 + 46879^2 .

It is not an unprimeable number, because it can be changed into a prime (11987357891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183237 + ... + 239896.

Almost surely, 2^11987357890 is an apocalyptic number.

11987357890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11987357890 is a deficient number, since it is larger than the sum of its proper divisors (9597553718).

11987357890 is a wasteful number, since it uses less digits than its factorization.

11987357890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425973.

The product of its (nonzero) digits is 3810240, while the sum is 58.

The spelling of 11987357890 in words is "eleven billion, nine hundred eighty-seven million, three hundred fifty-seven thousand, eight hundred ninety".