155082378025 has 81 divisors (see below), whose sum is σ = 211252741453. Its totient is φ = 112911769600.

The previous prime is 155082378023. The next prime is 155082378043. The reversal of 155082378025 is 520873280551.

The square root of 155082378025 is 393805.

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

It can be written as a sum of positive squares in 40 ways, for example, as 36694084249 + 118388293776 = 191557^2 + 344076^2 .

It is not a de Polignac number, because 155082378025 - 2¹ = 155082378023 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155082378023) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1372410369 + ... + 1372410481.

Almost surely, 2^155082378025 is an apocalyptic number.

155082378025 is the 393805-th square number.

155082378025 is the 196903-rd centered octagonal number.

It is an amenable number.

155082378025 is a deficient number, since it is larger than the sum of its proper divisors (56170363428).

155082378025 is an equidigital number, since it uses as much as digits as its factorization.

155082378025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 46.

The spelling of 155082378025 in words is "one hundred fifty-five billion, eighty-two million, three hundred seventy-eight thousand, twenty-five".