155020545450 has 144 divisors (see below), whose sum is σ = 431103043800. Its totient is φ = 39889920000.

The previous prime is 155020545439. The next prime is 155020545461. The reversal of 155020545450 is 54545020551.

155020545450 is a `hidden beast` number, since 1 + 5 + 50 + 20 + 545 + 45 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (155020545439) and next prime (155020545461).

It can be written as a sum of positive squares in 12 ways, for example, as 21615174441 + 133405371009 = 147021^2 + 365247^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 38743450 + ... + 38747450.

Almost surely, 2^155020545450 is an apocalyptic number.

155020545450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155020545450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215551521900).

155020545450 is an abundant number, since it is smaller than the sum of its proper divisors (276082498350).

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

155020545450 is a wasteful number, since it uses less digits than its factorization.

155020545450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7017 (or 7009 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 155020545450 in words is "one hundred fifty-five billion, twenty million, five hundred forty-five thousand, four hundred fifty".