155606920 has 32 divisors (see below), whose sum is σ = 400132800. Its totient is φ = 53350848.

The previous prime is 155606917. The next prime is 155606923. The reversal of 155606920 is 29606551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155606917) and next prime (155606923).

It is not an unprimeable number, because it can be changed into a prime (155606923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277590 + ... + 278149.

It is an arithmetic number, because the mean of its divisors is an integer number (12504150).

Almost surely, 2^155606920 is an apocalyptic number.

155606920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155606920 is an abundant number, since it is smaller than the sum of its proper divisors (244525880).

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

155606920 is a wasteful number, since it uses less digits than its factorization.

155606920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555757 (or 555753 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 155606920 is about 12474.2502780728. The cubic root of 155606920 is about 537.8687370650.

The spelling of 155606920 in words is "one hundred fifty-five million, six hundred six thousand, nine hundred twenty".