215958442848 has 24 divisors (see below), whose sum is σ = 566890912728. Its totient is φ = 71986147584.

The previous prime is 215958442841. The next prime is 215958442859. The reversal of 215958442848 is 848244859512.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×215958442848² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215958442791 and 215958442800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215958442841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124783461 + ... + 1124783652.

It is an arithmetic number, because the mean of its divisors is an integer number (23620454697).

Almost surely, 2^215958442848 is an apocalyptic number.

It is an amenable number.

215958442848 is an abundant number, since it is smaller than the sum of its proper divisors (350932469880).

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

215958442848 is a wasteful number, since it uses less digits than its factorization.

215958442848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249567126 (or 2249567118 counting only the distinct ones).

The product of its digits is 29491200, while the sum is 60.

The spelling of 215958442848 in words is "two hundred fifteen billion, nine hundred fifty-eight million, four hundred forty-two thousand, eight hundred forty-eight".