154025636521 has 9 divisors (see below), whose sum is σ = 157708209501. Its totient is φ = 150427161612.

The previous prime is 154025636509. The next prime is 154025636533. The reversal of 154025636521 is 125636520451.

The square root of 154025636521 is 392461.

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

154025636521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (154025636509) and next prime (154025636533).

It is not a de Polignac number, because 154025636521 - 2¹³ = 154025628329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154025666521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16871260 + ... + 16880386.

It is an arithmetic number, because the mean of its divisors is an integer number (17523134389).

Almost surely, 2^154025636521 is an apocalyptic number.

154025636521 is the 392461-st square number.

154025636521 is the 196231-st centered octagonal number.

It is an amenable number.

154025636521 is a deficient number, since it is larger than the sum of its proper divisors (3682572980).

154025636521 is an frugal number, since it uses more digits than its factorization.

154025636521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18340 (or 9170 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 154025636521 in words is "one hundred fifty-four billion, twenty-five million, six hundred thirty-six thousand, five hundred twenty-one".