195388420624 has 40 divisors (see below), whose sum is σ = 379430779608. Its totient is φ = 97470996480.

The previous prime is 195388420543. The next prime is 195388420639. The reversal of 195388420624 is 426024883591.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144375681024 + 51012739600 = 379968^2 + 225860^2 .

It is a super-2 number, since 2×195388420624² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20647254 + ... + 20656714.

Almost surely, 2^195388420624 is an apocalyptic number.

It is an amenable number.

195388420624 is a deficient number, since it is larger than the sum of its proper divisors (184042358984).

195388420624 is a wasteful number, since it uses less digits than its factorization.

195388420624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12283 (or 12277 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 195388420624 in words is "one hundred ninety-five billion, three hundred eighty-eight million, four hundred twenty thousand, six hundred twenty-four".