155472440445 has 80 divisors (see below), whose sum is σ = 319008907008. Its totient is φ = 70962428160.

The previous prime is 155472440329. The next prime is 155472440447. The reversal of 155472440445 is 544044274551.

155472440445 is a `hidden beast` number, since 1 + 5 + 547 + 24 + 40 + 4 + 45 = 666.

It is not a de Polignac number, because 155472440445 - 2¹¹ = 155472438397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 155472440445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155472440447) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1791865 + ... + 1876625.

Almost surely, 2^155472440445 is an apocalyptic number.

155472440445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155472440445 is an abundant number, since it is smaller than the sum of its proper divisors (163536466563).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155472440445 is an equidigital number, since it uses as much as digits as its factorization.

155472440445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85432 (or 85423 counting only the distinct ones).

The product of its (nonzero) digits is 1792000, while the sum is 45.

It can be divided in two parts, 1554724 and 40445, that added together give a square (1595169 = 1263²).

The spelling of 155472440445 in words is "one hundred fifty-five billion, four hundred seventy-two million, four hundred forty thousand, four hundred forty-five".