8154993025 has 9 divisors (see below), whose sum is σ = 10112751273. Its totient is φ = 6523633200.

The previous prime is 8154993023. The next prime is 8154993061. The reversal of 8154993025 is 5203994518.

The square root of 8154993025 is 90305.

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

It can be written as a sum of positive squares in 4 ways, for example, as 300779649 + 7854213376 = 17343^2 + 88624^2 .

It is not a de Polignac number, because 8154993025 - 2¹ = 8154993023 is a prime.

It is a super-2 number, since 2×8154993025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8154993023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 442495 + ... + 460555.

Almost surely, 2^8154993025 is an apocalyptic number.

8154993025 is the 90305-th square number.

8154993025 is the 45153-rd centered octagonal number.

It is an amenable number.

8154993025 is a deficient number, since it is larger than the sum of its proper divisors (1957758248).

8154993025 is an frugal number, since it uses more digits than its factorization.

8154993025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36132 (or 18066 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The cubic root of 8154993025 is about 2012.8335591555.

The spelling of 8154993025 in words is "eight billion, one hundred fifty-four million, nine hundred ninety-three thousand, twenty-five".