11781947425578 has 32 divisors (see below), whose sum is σ = 25739846546112. Its totient is φ = 3565595510400.

The previous prime is 11781947425529. The next prime is 11781947425579. The reversal of 11781947425578 is 87552474918711.

It is not an unprimeable number, because it can be changed into a prime (11781947425579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117239101 + ... + 117339552.

It is an arithmetic number, because the mean of its divisors is an integer number (804370204566).

Almost surely, 2^{11781947425578} is an apocalyptic number.

11781947425578 is an abundant number, since it is smaller than the sum of its proper divisors (13957899120534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11781947425578 is a wasteful number, since it uses less digits than its factorization.

11781947425578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234579430.

The product of its digits is 158054400, while the sum is 69.

The spelling of 11781947425578 in words is "eleven trillion, seven hundred eighty-one billion, nine hundred forty-seven million, four hundred twenty-five thousand, five hundred seventy-eight".