215671147652756 has 6 divisors (see below), whose sum is σ = 377424508392330. Its totient is φ = 107835573826376.

The previous prime is 215671147652687. The next prime is 215671147652767. The reversal of 215671147652756 is 657256741176512.

It can be written as a sum of positive squares in only one way, i.e., 215630134922500 + 41012730256 = 14684350^2 + 202516^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215671147652692 and 215671147652701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26958893456591 + ... + 26958893456598.

It is an arithmetic number, because the mean of its divisors is an integer number (62904084732055).

Almost surely, 2^{215671147652756} is an apocalyptic number.

It is an amenable number.

215671147652756 is a deficient number, since it is larger than the sum of its proper divisors (161753360739574).

215671147652756 is a wasteful number, since it uses less digits than its factorization.

215671147652756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53917786913193 (or 53917786913191 counting only the distinct ones).

The product of its digits is 148176000, while the sum is 65.

The spelling of 215671147652756 in words is "two hundred fifteen trillion, six hundred seventy-one billion, one hundred forty-seven million, six hundred fifty-two thousand, seven hundred fifty-six".