155406745 has 16 divisors (see below), whose sum is σ = 209567232. Its totient is φ = 109771200.

The previous prime is 155406739. The next prime is 155406749. The reversal of 155406745 is 547604551.

It is a happy number.

It is not a de Polignac number, because 155406745 - 2⁷ = 155406617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155406749) 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, 50481 + ... + 53470.

It is an arithmetic number, because the mean of its divisors is an integer number (13097952).

Almost surely, 2^155406745 is an apocalyptic number.

It is an amenable number.

155406745 is a deficient number, since it is larger than the sum of its proper divisors (54160487).

155406745 is a wasteful number, since it uses less digits than its factorization.

155406745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103992.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 155406745 is about 12466.2241677262. The cubic root of 155406745 is about 537.6379973781.

The spelling of 155406745 in words is "one hundred fifty-five million, four hundred six thousand, seven hundred forty-five".