155732903531401 has 81 divisors (see below), whose sum is σ = 187762921022439. Its totient is φ = 128788761705408.

The previous prime is 155732903531363. The next prime is 155732903531407. The reversal of 155732903531401 is 104135309237551.

The square root of 155732903531401 is 12479299.

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., 134687049975625 + 21045853555776 = 11605475^2 + 4587576^2 .

It is not a de Polignac number, because 155732903531401 - 2⁹ = 155732903530889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (155732903531407) 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, 340772217565 + ... + 340772218021.

Almost surely, 2^{155732903531401} is an apocalyptic number.

155732903531401 is the 12479299-th square number.

155732903531401 is the 6239650-th centered octagonal number.

It is an amenable number.

155732903531401 is a deficient number, since it is larger than the sum of its proper divisors (32030017491038).

155732903531401 is an frugal number, since it uses more digits than its factorization.

155732903531401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 1701000, while the sum is 49.

155732903531401 divided by its sum of digits (49) gives a square (3178222521049 = 1782757²).

The spelling of 155732903531401 in words is "one hundred fifty-five trillion, seven hundred thirty-two billion, nine hundred three million, five hundred thirty-one thousand, four hundred one".