11435609778 has 48 divisors (see below), whose sum is σ = 23725804608. Its totient is φ = 3674392800.

The previous prime is 11435609771. The next prime is 11435609813. The reversal of 11435609778 is 87790653411.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11435609778.

It is not an unprimeable number, because it can be changed into a prime (11435609771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1512688 + ... + 1520228.

It is an arithmetic number, because the mean of its divisors is an integer number (494287596).

Almost surely, 2^11435609778 is an apocalyptic number.

11435609778 is an abundant number, since it is smaller than the sum of its proper divisors (12290194830).

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

11435609778 is a wasteful number, since it uses less digits than its factorization.

11435609778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7871 (or 7840 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 11435609778 in words is "eleven billion, four hundred thirty-five million, six hundred nine thousand, seven hundred seventy-eight".