938120643690 has 64 divisors (see below), whose sum is σ = 2282336179200. Its totient is φ = 246758690304.

The previous prime is 938120643671. The next prime is 938120643721. The reversal of 938120643690 is 96346021839.

It is a super-5 number, since 5×938120643690⁵ (a number of 61 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85966 + ... + 1372454.

It is an arithmetic number, because the mean of its divisors is an integer number (35661502800).

Almost surely, 2^938120643690 is an apocalyptic number.

938120643690 is an abundant number, since it is smaller than the sum of its proper divisors (1344215535510).

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

938120643690 is a wasteful number, since it uses less digits than its factorization.

938120643690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286831.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 938120643690 in words is "nine hundred thirty-eight billion, one hundred twenty million, six hundred forty-three thousand, six hundred ninety".