126691378930 has 32 divisors (see below), whose sum is σ = 230699553840. Its totient is φ = 50087915520.

The previous prime is 126691378927. The next prime is 126691378963. The reversal of 126691378930 is 39873196621.

It can be written as a sum of positive squares in 8 ways, for example, as 22332014721 + 104359364209 = 149439^2 + 323047^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652356 + ... + 823984.

Almost surely, 2^126691378930 is an apocalyptic number.

126691378930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126691378930 is a deficient number, since it is larger than the sum of its proper divisors (104008174910).

126691378930 is a wasteful number, since it uses less digits than its factorization.

126691378930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172494.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 126691378930 in words is "one hundred twenty-six billion, six hundred ninety-one million, three hundred seventy-eight thousand, nine hundred thirty".