918137658025 has 45 divisors (see below), whose sum is σ = 1328499799223. Its totient is φ = 629419131600.

The previous prime is 918137658019. The next prime is 918137658059. The reversal of 918137658025 is 520856731819.

The square root of 918137658025 is 958195.

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

918137658025 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., 330529556889 + 587608101136 = 574917^2 + 766556^2 .

It is not a de Polignac number, because 918137658025 - 2⁷ = 918137657897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 234755820 + ... + 234759730.

Almost surely, 2^918137658025 is an apocalyptic number.

918137658025 is the 958195-th square number.

918137658025 is the 479098-th centered octagonal number.

It is an amenable number.

918137658025 is a deficient number, since it is larger than the sum of its proper divisors (410362141198).

918137658025 is an frugal number, since it uses more digits than its factorization.

918137658025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7860 (or 3923 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 918137658025 in words is "nine hundred eighteen billion, one hundred thirty-seven million, six hundred fifty-eight thousand, twenty-five".