1019775711816 has 64 divisors (see below), whose sum is σ = 2832854640000. Its totient is φ = 339907917888.

The previous prime is 1019775711811. The next prime is 1019775711887. The reversal of 1019775711816 is 6181175779101.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1019775711811) 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, 4547250 + ... + 4766238.

It is an arithmetic number, because the mean of its divisors is an integer number (44263353750).

Almost surely, 2^{1019775711816} is an apocalyptic number.

It is an amenable number.

1019775711816 is an abundant number, since it is smaller than the sum of its proper divisors (1813078928184).

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

1019775711816 is a wasteful number, since it uses less digits than its factorization.

1019775711816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240563 (or 240553 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 54.

The spelling of 1019775711816 in words is "one trillion, nineteen billion, seven hundred seventy-five million, seven hundred eleven thousand, eight hundred sixteen".