215486263440 has 200 divisors, whose sum is σ = 855332427840. Its totient is φ = 49253992704.

The previous prime is 215486263439. The next prime is 215486263451. The reversal of 215486263440 is 44362684512.

215486263440 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 8 + 6 + 2 + 634 + 4 + 0 = 666.

215486263440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 2329930 + ... + 2420649.

Almost surely, 2^215486263440 is an apocalyptic number.

215486263440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215486263440 is an abundant number, since it is smaller than the sum of its proper divisors (639846164400).

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

215486263440 is a wasteful number, since it uses less digits than its factorization.

215486263440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750611 (or 4750596 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 215486263440 in words is "two hundred fifteen billion, four hundred eighty-six million, two hundred sixty-three thousand, four hundred forty".