149146578025 has 9 divisors (see below), whose sum is σ = 184944151191. Its totient is φ = 119315717640.

The previous prime is 149146578019. The next prime is 149146578121. The reversal of 149146578025 is 520875641941.

The square root of 149146578025 is 386195.

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

It can be written as a sum of positive squares in only one way, i.e., 53692768089 + 95453809936 = 231717^2 + 308956^2 .

It is not a de Polignac number, because 149146578025 - 2⁷ = 149146577897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1892356 + ... + 1969594.

Almost surely, 2^149146578025 is an apocalyptic number.

149146578025 is the 386195-th square number.

149146578025 is the 193098-th centered octagonal number.

It is an amenable number.

149146578025 is a deficient number, since it is larger than the sum of its proper divisors (35797573166).

149146578025 is an frugal number, since it uses more digits than its factorization.

149146578025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154488 (or 77244 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 149146578025 in words is "one hundred forty-nine billion, one hundred forty-six million, five hundred seventy-eight thousand, twenty-five".