155105994 has 32 divisors (see below), whose sum is σ = 330203520. Its totient is φ = 48402432.

The previous prime is 155105953. The next prime is 155105999. The reversal of 155105994 is 499501551.

It is not an unprimeable number, because it can be changed into a prime (155105999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15747 + ... + 23625.

It is an arithmetic number, because the mean of its divisors is an integer number (10318860).

Almost surely, 2^155105994 is an apocalyptic number.

155105994 is an abundant number, since it is smaller than the sum of its proper divisors (175097526).

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

155105994 is a wasteful number, since it uses less digits than its factorization.

155105994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8094.

The product of its (nonzero) digits is 40500, while the sum is 39.

The square root of 155105994 is about 12454.1556919769. The cubic root of 155105994 is about 537.2909519855.

The spelling of 155105994 in words is "one hundred fifty-five million, one hundred five thousand, nine hundred ninety-four".