2069398780778 has 16 divisors (see below), whose sum is σ = 3570136571904. Its totient is φ = 881236240560.

The previous prime is 2069398780751. The next prime is 2069398780781. The reversal of 2069398780778 is 8770878939602.

It is a super-2 number, since 2×2069398780778² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470743658 + ... + 470748053.

It is an arithmetic number, because the mean of its divisors is an integer number (223133535744).

Almost surely, 2^{2069398780778} is an apocalyptic number.

2069398780778 is a deficient number, since it is larger than the sum of its proper divisors (1500737791126).

2069398780778 is a wasteful number, since it uses less digits than its factorization.

2069398780778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941491877.

The product of its (nonzero) digits is 512096256, while the sum is 74.

The spelling of 2069398780778 in words is "two trillion, sixty-nine billion, three hundred ninety-eight million, seven hundred eighty thousand, seven hundred seventy-eight".