155072407 has 12 divisors (see below), whose sum is σ = 180984576. Its totient is φ = 132481440.

The previous prime is 155072399. The next prime is 155072413. The reversal of 155072407 is 704270551.

It is not a de Polignac number, because 155072407 - 2³ = 155072399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155072107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10282 + ... + 20392.

It is an arithmetic number, because the mean of its divisors is an integer number (15082048).

Almost surely, 2^155072407 is an apocalyptic number.

155072407 is a deficient number, since it is larger than the sum of its proper divisors (25912169).

155072407 is a wasteful number, since it uses less digits than its factorization.

155072407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10438 (or 10431 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 155072407 is about 12452.8071935608. The cubic root of 155072407 is about 537.2521671230.

The spelling of 155072407 in words is "one hundred fifty-five million, seventy-two thousand, four hundred seven".