155549705554 has 8 divisors (see below), whose sum is σ = 236135697840. Its totient is φ = 76837806276.

The previous prime is 155549705539. The next prime is 155549705557. The reversal of 155549705554 is 455507945551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 155549705495 and 155549705504.

It is not an unprimeable number, because it can be changed into a prime (155549705557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468523044 + ... + 468523375.

It is an arithmetic number, because the mean of its divisors is an integer number (29516962230).

Almost surely, 2^155549705554 is an apocalyptic number.

155549705554 is a deficient number, since it is larger than the sum of its proper divisors (80585992286).

155549705554 is an equidigital number, since it uses as much as digits as its factorization.

155549705554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937046504.

The product of its (nonzero) digits is 15750000, while the sum is 55.

The spelling of 155549705554 in words is "one hundred fifty-five billion, five hundred forty-nine million, seven hundred five thousand, five hundred fifty-four".