258397697678 has 8 divisors (see below), whose sum is σ = 391218944472. Its totient is φ = 127991382856.

The previous prime is 258397697671. The next prime is 258397697749. The reversal of 258397697678 is 876796793852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 258397697599 and 258397697608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258397697671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603732725 + ... + 603733152.

It is an arithmetic number, because the mean of its divisors is an integer number (48902368059).

Almost surely, 2^258397697678 is an apocalyptic number.

258397697678 is a deficient number, since it is larger than the sum of its proper divisors (132821246794).

258397697678 is a wasteful number, since it uses less digits than its factorization.

258397697678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207465986.

The product of its digits is 1920360960, while the sum is 77.

The spelling of 258397697678 in words is "two hundred fifty-eight billion, three hundred ninety-seven million, six hundred ninety-seven thousand, six hundred seventy-eight".