867623188640 has 96 divisors (see below), whose sum is σ = 2217896505216. Its totient is φ = 318834754560.

The previous prime is 867623188639. The next prime is 867623188661. The reversal of 867623188640 is 46881326768.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 867623188640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549572 + ... + 1427331.

It is an arithmetic number, because the mean of its divisors is an integer number (23103088596).

Almost surely, 2^867623188640 is an apocalyptic number.

867623188640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

867623188640 is an abundant number, since it is smaller than the sum of its proper divisors (1350273316576).

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

867623188640 is a wasteful number, since it uses less digits than its factorization.

867623188640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977142 (or 1977134 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 867623188640 in words is "eight hundred sixty-seven billion, six hundred twenty-three million, one hundred eighty-eight thousand, six hundred forty".