238697221779 has 12 divisors (see below), whose sum is σ = 344930324232. Its totient is φ = 159064351200.

The previous prime is 238697221769. The next prime is 238697221781. The reversal of 238697221779 is 977122796832.

It is not a de Polignac number, because 238697221779 - 2⁸ = 238697221523 is a prime.

It is a super-2 number, since 2×238697221779² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (238697221769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5571642 + ... + 5614319.

It is an arithmetic number, because the mean of its divisors is an integer number (28744193686).

Almost surely, 2^238697221779 is an apocalyptic number.

238697221779 is a deficient number, since it is larger than the sum of its proper divisors (106233102453).

238697221779 is a wasteful number, since it uses less digits than its factorization.

238697221779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11188338 (or 11188335 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 238697221779 in words is "two hundred thirty-eight billion, six hundred ninety-seven million, two hundred twenty-one thousand, seven hundred seventy-nine".