131778102730 has 16 divisors (see below), whose sum is σ = 237595272264. Its totient is φ = 52623532800.

The previous prime is 131778102719. The next prime is 131778102737. The reversal of 131778102730 is 37201877131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 129009554041 + 2768548689 = 359179^2 + 52617^2 .

It is not an unprimeable number, because it can be changed into a prime (131778102737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10957227 + ... + 10969246.

Almost surely, 2^131778102730 is an apocalyptic number.

131778102730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131778102730 is a deficient number, since it is larger than the sum of its proper divisors (105817169534).

131778102730 is a wasteful number, since it uses less digits than its factorization.

131778102730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21927081.

The product of its (nonzero) digits is 49392, while the sum is 40.

Adding to 131778102730 its reverse (37201877131), we get a palindrome (168979979861).

The spelling of 131778102730 in words is "one hundred thirty-one billion, seven hundred seventy-eight million, one hundred two thousand, seven hundred thirty".