155001502120 has 64 divisors (see below), whose sum is σ = 351180385920. Its totient is φ = 61569978624.

The previous prime is 155001502111. The next prime is 155001502127. The reversal of 155001502120 is 21205100551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155001502091 and 155001502100.

It is not an unprimeable number, because it can be changed into a prime (155001502127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6097677 + ... + 6123043.

It is an arithmetic number, because the mean of its divisors is an integer number (5487193530).

Almost surely, 2^155001502120 is an apocalyptic number.

155001502120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155001502120 is an abundant number, since it is smaller than the sum of its proper divisors (196178883800).

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

155001502120 is a wasteful number, since it uses less digits than its factorization.

155001502120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26434 (or 26430 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

Adding to 155001502120 its reverse (21205100551), we get a palindrome (176206602671).

The spelling of 155001502120 in words is "one hundred fifty-five billion, one million, five hundred two thousand, one hundred twenty".