994408172258 has 6 divisors (see below), whose sum is σ = 1491614373771. Its totient is φ = 497203381002.

The previous prime is 994408172257. The next prime is 994408172293. The reversal of 994408172258 is 852271804499.

994408172258 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 497204086129 + 497204086129 = 705127^2 + 705127^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=705127.

It is a super-2 number, since 2×994408172258² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 994408172197 and 994408172206.

It is not an unprimeable number, because it can be changed into a prime (994408172257) 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, 1057691 + ... + 1762817.

Almost surely, 2^994408172258 is an apocalyptic number.

994408172258 is a deficient number, since it is larger than the sum of its proper divisors (497206201513).

994408172258 is an frugal number, since it uses more digits than its factorization.

994408172258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410256 (or 705129 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 994408172258 in words is "nine hundred ninety-four billion, four hundred eight million, one hundred seventy-two thousand, two hundred fifty-eight".