215610857042 has 32 divisors (see below), whose sum is σ = 370729258752. Its totient is φ = 92127357504.

The previous prime is 215610857041. The next prime is 215610857051. The reversal of 215610857042 is 240758016512.

It is not an unprimeable number, because it can be changed into a prime (215610857041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7437608 + ... + 7466540.

It is an arithmetic number, because the mean of its divisors is an integer number (11585289336).

Almost surely, 2^215610857042 is an apocalyptic number.

215610857042 is a deficient number, since it is larger than the sum of its proper divisors (155118401710).

215610857042 is a wasteful number, since it uses less digits than its factorization.

215610857042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30522.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 215610857042 in words is "two hundred fifteen billion, six hundred ten million, eight hundred fifty-seven thousand, forty-two".