155087804440 has 32 divisors (see below), whose sum is σ = 356371980480. Its totient is φ = 60715224832.

The previous prime is 155087804413. The next prime is 155087804447. The reversal of 155087804440 is 44408780551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155087804447) 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, 41244877 + ... + 41248636.

It is an arithmetic number, because the mean of its divisors is an integer number (11136624390).

Almost surely, 2^155087804440 is an apocalyptic number.

155087804440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155087804440 is an abundant number, since it is smaller than the sum of its proper divisors (201284176040).

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

155087804440 is a wasteful number, since it uses less digits than its factorization.

155087804440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82493571 (or 82493567 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 46.

The spelling of 155087804440 in words is "one hundred fifty-five billion, eighty-seven million, eight hundred four thousand, four hundred forty".