215554336540 has 12 divisors (see below), whose sum is σ = 452664106776. Its totient is φ = 86221734608.

The previous prime is 215554336537. The next prime is 215554336559. The reversal of 215554336540 is 45633455512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5388858394 + ... + 5388858433.

It is an arithmetic number, because the mean of its divisors is an integer number (37722008898).

Almost surely, 2^215554336540 is an apocalyptic number.

215554336540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215554336540 is an abundant number, since it is smaller than the sum of its proper divisors (237109770236).

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

215554336540 is a wasteful number, since it uses less digits than its factorization.

215554336540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10777716836 (or 10777716834 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 43.

The spelling of 215554336540 in words is "two hundred fifteen billion, five hundred fifty-four million, three hundred thirty-six thousand, five hundred forty".