130778276738 has 6 divisors (see below), whose sum is σ = 196168182249. Its totient is φ = 65388882656.

The previous prime is 130778276737. The next prime is 130778276767. The reversal of 130778276738 is 837672877031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 91577048689 + 39201228049 = 302617^2 + 197993^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=255713.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130778276731) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 383570 + ... + 639282.

Almost surely, 2^130778276738 is an apocalyptic number.

130778276738 is a deficient number, since it is larger than the sum of its proper divisors (65389905511).

130778276738 is an frugal number, since it uses more digits than its factorization.

130778276738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511428 (or 255715 counting only the distinct ones).

The product of its (nonzero) digits is 16595712, while the sum is 59.

The spelling of 130778276738 in words is "one hundred thirty billion, seven hundred seventy-eight million, two hundred seventy-six thousand, seven hundred thirty-eight".