133758778657 has 48 divisors (see below), whose sum is σ = 159345967872. Its totient is φ = 111929610240.

The previous prime is 133758778619. The next prime is 133758778669. The reversal of 133758778657 is 756877857331.

It is a de Polignac number, because none of the positive numbers 2^k-133758778657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133758778592 and 133758778601.

It is not an unprimeable number, because it can be changed into a prime (133758770657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 211978732 + ... + 211979362.

It is an arithmetic number, because the mean of its divisors is an integer number (3319707664).

Almost surely, 2^133758778657 is an apocalyptic number.

It is an amenable number.

133758778657 is a deficient number, since it is larger than the sum of its proper divisors (25587189215).

133758778657 is a wasteful number, since it uses less digits than its factorization.

133758778657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278 (or 1271 counting only the distinct ones).

The product of its digits is 207446400, while the sum is 67.

The spelling of 133758778657 in words is "one hundred thirty-three billion, seven hundred fifty-eight million, seven hundred seventy-eight thousand, six hundred fifty-seven".