2135369426778 has 24 divisors (see below), whose sum is σ = 5287581438048. Its totient is φ = 610105550472.

The previous prime is 2135369426767. The next prime is 2135369426779. The reversal of 2135369426778 is 8776249635312.

It is a happy number.

2135369426778 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 369 + 4 + 267 + 7 + 8 = 666.

It is a super-2 number, since 2×2135369426778² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (2135369426779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8473688076 + ... + 8473688327.

It is an arithmetic number, because the mean of its divisors is an integer number (220315893252).

Almost surely, 2^{2135369426778} is an apocalyptic number.

2135369426778 is an abundant number, since it is smaller than the sum of its proper divisors (3152212011270).

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

2135369426778 is a wasteful number, since it uses less digits than its factorization.

2135369426778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16947376418 (or 16947376415 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 63.

The spelling of 2135369426778 in words is "two trillion, one hundred thirty-five billion, three hundred sixty-nine million, four hundred twenty-six thousand, seven hundred seventy-eight".