78661133026126 has 64 divisors (see below), whose sum is σ = 143948883686400. Its totient is φ = 31489415076096.

The previous prime is 78661133026117. The next prime is 78661133026213. The reversal of 78661133026126 is 62162033116687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5466 + ... + 12542818.

It is an arithmetic number, because the mean of its divisors is an integer number (2249201307600).

Almost surely, 2^{78661133026126} is an apocalyptic number.

78661133026126 is a deficient number, since it is larger than the sum of its proper divisors (65287750660274).

78661133026126 is a wasteful number, since it uses less digits than its factorization.

78661133026126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537713.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 78661133026126 in words is "seventy-eight trillion, six hundred sixty-one billion, one hundred thirty-three million, twenty-six thousand, one hundred twenty-six".