155836347487 has 4 divisors (see below), whose sum is σ = 162611840880. Its totient is φ = 149060854096.

The previous prime is 155836347467. The next prime is 155836347493. The reversal of 155836347487 is 784743638551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155836347487 is a prime.

It is a super-2 number, since 2×155836347487² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155836347467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387746662 + ... + 3387746707.

It is an arithmetic number, because the mean of its divisors is an integer number (40652960220).

Almost surely, 2^155836347487 is an apocalyptic number.

155836347487 is a deficient number, since it is larger than the sum of its proper divisors (6775493393).

155836347487 is an equidigital number, since it uses as much as digits as its factorization.

155836347487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775493392.

The product of its digits is 67737600, while the sum is 61.

The spelling of 155836347487 in words is "one hundred fifty-five billion, eight hundred thirty-six million, three hundred forty-seven thousand, four hundred eighty-seven".