987278123650 has 48 divisors (see below), whose sum is σ = 2260107468864. Its totient is φ = 312457250880.

The previous prime is 987278123593. The next prime is 987278123677. The reversal of 987278123650 is 56321872789.

It is a happy number.

987278123650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108487552 + ... + 108496651.

It is an arithmetic number, because the mean of its divisors is an integer number (47085572268).

Almost surely, 2^987278123650 is an apocalyptic number.

987278123650 is an abundant number, since it is smaller than the sum of its proper divisors (1272829345214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

987278123650 is a wasteful number, since it uses less digits than its factorization.

987278123650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216984235 (or 216984230 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 987278123650 in words is "nine hundred eighty-seven billion, two hundred seventy-eight million, one hundred twenty-three thousand, six hundred fifty".