155706645 has 32 divisors (see below), whose sum is σ = 259743744. Its totient is φ = 79560000.

The previous prime is 155706637. The next prime is 155706659. The reversal of 155706645 is 546607551.

155706645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155706645 - 2³ = 155706637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46270 + ... + 49520.

It is an arithmetic number, because the mean of its divisors is an integer number (8116992).

Almost surely, 2^155706645 is an apocalyptic number.

155706645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155706645 is a deficient number, since it is larger than the sum of its proper divisors (104037099).

155706645 is a wasteful number, since it uses less digits than its factorization.

155706645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 155706645 is about 12478.2468720570. The cubic root of 155706645 is about 537.9836152148.

The spelling of 155706645 in words is "one hundred fifty-five million, seven hundred six thousand, six hundred forty-five".