155423394490 has 128 divisors (see below), whose sum is σ = 354838579200. Its totient is φ = 48700512000.

The previous prime is 155423394449. The next prime is 155423394509. The reversal of 155423394490 is 94493324551.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4486335 + ... + 4520845.

It is an arithmetic number, because the mean of its divisors is an integer number (2772176400).

Almost surely, 2^155423394490 is an apocalyptic number.

155423394490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155423394490 is an abundant number, since it is smaller than the sum of its proper divisors (199415184710).

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

155423394490 is a wasteful number, since it uses less digits than its factorization.

155423394490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34653 (or 34639 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 155423394490 in words is "one hundred fifty-five billion, four hundred twenty-three million, three hundred ninety-four thousand, four hundred ninety".