155547853940 has 12 divisors (see below), whose sum is σ = 326650493316. Its totient is φ = 62219141568.

The previous prime is 155547853921. The next prime is 155547853943. The reversal of 155547853940 is 49358745551.

It can be written as a sum of positive squares in 2 ways, for example, as 74320573924 + 81227280016 = 272618^2 + 285004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155547853943) 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, 3888696329 + ... + 3888696368.

It is an arithmetic number, because the mean of its divisors is an integer number (27220874443).

Almost surely, 2^155547853940 is an apocalyptic number.

155547853940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155547853940 is an abundant number, since it is smaller than the sum of its proper divisors (171102639376).

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

155547853940 is a wasteful number, since it uses less digits than its factorization.

155547853940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777392706 (or 7777392704 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 56.

The spelling of 155547853940 in words is "one hundred fifty-five billion, five hundred forty-seven million, eight hundred fifty-three thousand, nine hundred forty".