155473278601 has 9 divisors (see below), whose sum is σ = 156054669141. Its totient is φ = 154894050432.

The previous prime is 155473278557. The next prime is 155473278607. The reversal of 155473278601 is 106872374551.

The square root of 155473278601 is 394301.

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 59608734201 + 95864544400 = 244149^2 + 309620^2 .

It is not a de Polignac number, because 155473278601 - 2²⁵ = 155439724169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155473278607) 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, 139187695 + ... + 139188811.

Almost surely, 2^155473278601 is an apocalyptic number.

155473278601 is the 394301-st square number.

155473278601 is the 197151-st centered octagonal number.

It is an amenable number.

155473278601 is a deficient number, since it is larger than the sum of its proper divisors (581390540).

155473278601 is an frugal number, since it uses more digits than its factorization.

155473278601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

Multiplying 155473278601 by its sum of digits (49), we get a square (7618190651449 = 2760107²).

The spelling of 155473278601 in words is "one hundred fifty-five billion, four hundred seventy-three million, two hundred seventy-eight thousand, six hundred one".