131516466789 has 4 divisors (see below), whose sum is σ = 175355289056. Its totient is φ = 87677644524.

The previous prime is 131516466787. The next prime is 131516466797. The reversal of 131516466789 is 987664615131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131516466789 - 2¹ = 131516466787 is a prime.

It is a super-4 number, since 4×131516466789⁴ (a number of 46 digits) contains 4444 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 (131516466787) 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, 21919411129 + ... + 21919411134.

It is an arithmetic number, because the mean of its divisors is an integer number (43838822264).

Almost surely, 2^131516466789 is an apocalyptic number.

It is an amenable number.

131516466789 is a deficient number, since it is larger than the sum of its proper divisors (43838822267).

131516466789 is an equidigital number, since it uses as much as digits as its factorization.

131516466789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43838822266.

The product of its digits is 6531840, while the sum is 57.

It can be divided in two parts, 1315164 and 66789, that added together give a triangular number (1381953 = T₁₆₆₂).

The spelling of 131516466789 in words is "one hundred thirty-one billion, five hundred sixteen million, four hundred sixty-six thousand, seven hundred eighty-nine".