1421193080778 has 16 divisors (see below), whose sum is σ = 2842886385696. Its totient is φ = 473647656240.

The previous prime is 1421193080777. The next prime is 1421193080819. The reversal of 1421193080778 is 8770803911241.

It is a self number, because there is not a number n which added to its sum of digits gives 1421193080778.

It is not an unprimeable number, because it can be changed into a prime (1421193080777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20805733 + ... + 20873928.

It is an arithmetic number, because the mean of its divisors is an integer number (177680399106).

Almost surely, 2^{1421193080778} is an apocalyptic number.

1421193080778 is an abundant number, since it is smaller than the sum of its proper divisors (1421693304918).

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

1421193080778 is a wasteful number, since it uses less digits than its factorization.

1421193080778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41685349.

The product of its (nonzero) digits is 677376, while the sum is 51.

The spelling of 1421193080778 in words is "one trillion, four hundred twenty-one billion, one hundred ninety-three million, eighty thousand, seven hundred seventy-eight".