67758398939401 has 3 divisors (see below), whose sum is σ = 67758407170951. Its totient is φ = 67758390707852.

The previous prime is 67758398939381. The next prime is 67758398939417. The reversal of 67758398939401 is 10493989385776.

It is a happy number.

The square root of 67758398939401 is 8231549.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 14238932449401 + 53519466490000 = 3773451^2 + 7315700^2 .

It is not a de Polignac number, because 67758398939401 - 2⁵ = 67758398939369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67758398939801) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4115775 + ... + 12347323.

Almost surely, 2^{67758398939401} is an apocalyptic number.

67758398939401 is the 8231549-th square number.

67758398939401 is the 4115775-th centered octagonal number.

It is an amenable number.

67758398939401 is a deficient number, since it is larger than the sum of its proper divisors (8231550).

67758398939401 is an frugal number, since it uses more digits than its factorization.

67758398939401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16463098 (or 8231549 counting only the distinct ones).

The product of its (nonzero) digits is 2469035520, while the sum is 79.

The spelling of 67758398939401 in words is "sixty-seven trillion, seven hundred fifty-eight billion, three hundred ninety-eight million, nine hundred thirty-nine thousand, four hundred one".