215463654321240 has 64 divisors (see below), whose sum is σ = 696113344735200. Its totient is φ = 53037207217152.

The previous prime is 215463654321217. The next prime is 215463654321299. The reversal of 215463654321240 is 42123456364512.

It is a self number, because there is not a number n which added to its sum of digits gives 215463654321240.

It is a congruent number.

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, 69058862005 + ... + 69058865124.

Almost surely, 2^{215463654321240} is an apocalyptic number.

215463654321240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215463654321240 is an abundant number, since it is smaller than the sum of its proper divisors (480649690413960).

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

215463654321240 is a wasteful number, since it uses less digits than its factorization.

215463654321240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138117727156 (or 138117727152 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 215463654321240 in words is "two hundred fifteen trillion, four hundred sixty-three billion, six hundred fifty-four million, three hundred twenty-one thousand, two hundred forty".