155502120441 has 4 divisors (see below), whose sum is σ = 207336160592. Its totient is φ = 103668080292.

The previous prime is 155502120439. The next prime is 155502120461. The reversal of 155502120441 is 144021205551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 155502120441 - 2¹ = 155502120439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155502120399 and 155502120408.

It is not an unprimeable number, because it can be changed into a prime (155502120461) 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, 25917020071 + ... + 25917020076.

It is an arithmetic number, because the mean of its divisors is an integer number (51834040148).

Almost surely, 2^155502120441 is an apocalyptic number.

It is an amenable number.

155502120441 is a deficient number, since it is larger than the sum of its proper divisors (51834040151).

155502120441 is an equidigital number, since it uses as much as digits as its factorization.

155502120441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51834040150.

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 155502120441 its reverse (144021205551), we get a palindrome (299523325992).

The spelling of 155502120441 in words is "one hundred fifty-five billion, five hundred two million, one hundred twenty thousand, four hundred forty-one".