155872753238 has 4 divisors (see below), whose sum is σ = 233809129860. Its totient is φ = 77936376618.

The previous prime is 155872753237. The next prime is 155872753277. The reversal of 155872753238 is 832357278551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832357278551 = 283 ⋅2941191797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155872753237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38968188308 + ... + 38968188311.

It is an arithmetic number, because the mean of its divisors is an integer number (58452282465).

Almost surely, 2^155872753238 is an apocalyptic number.

155872753238 is a deficient number, since it is larger than the sum of its proper divisors (77936376622).

155872753238 is an equidigital number, since it uses as much as digits as its factorization.

155872753238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77936376621.

The product of its digits is 14112000, while the sum is 56.

The spelling of 155872753238 in words is "one hundred fifty-five billion, eight hundred seventy-two million, seven hundred fifty-three thousand, two hundred thirty-eight".