155364405040 has 80 divisors (see below), whose sum is σ = 389584939968. Its totient is φ = 57280324608.

The previous prime is 155364405037. The next prime is 155364405061. The reversal of 155364405040 is 40504463551.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593749 + ... + 814411.

Almost surely, 2^155364405040 is an apocalyptic number.

155364405040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155364405040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194792469984).

155364405040 is an abundant number, since it is smaller than the sum of its proper divisors (234220534928).

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

155364405040 is a wasteful number, since it uses less digits than its factorization.

155364405040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221366 (or 221360 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 155364405040 its reverse (40504463551), we get a palindrome (195868868591).

The spelling of 155364405040 in words is "one hundred fifty-five billion, three hundred sixty-four million, four hundred five thousand, forty".