155561642324 has 24 divisors (see below), whose sum is σ = 296999740800. Its totient is φ = 70705450880.

The previous prime is 155561642323. The next prime is 155561642329. The reversal of 155561642324 is 423246165551.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155561642323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 669932 + ... + 871740.

It is an arithmetic number, because the mean of its divisors is an integer number (12374989200).

Almost surely, 2^155561642324 is an apocalyptic number.

It is an amenable number.

155561642324 is a deficient number, since it is larger than the sum of its proper divisors (141438098476).

155561642324 is a wasteful number, since it uses less digits than its factorization.

155561642324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219343 (or 219341 counting only the distinct ones).

The product of its digits is 864000, while the sum is 44.

The spelling of 155561642324 in words is "one hundred fifty-five billion, five hundred sixty-one million, six hundred forty-two thousand, three hundred twenty-four".