1420778656320 has 56 divisors (see below), whose sum is σ = 4510972236864. Its totient is φ = 378874308096.

The previous prime is 1420778656259. The next prime is 1420778656321. The reversal of 1420778656320 is 236568770241.

It is a happy number.

It is a super-2 number, since 2×1420778656320² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1420778656321) 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, 739987924 + ... + 739989843.

Almost surely, 2^{1420778656320} is an apocalyptic number.

1420778656320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1420778656320 is an abundant number, since it is smaller than the sum of its proper divisors (3090193580544).

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

1420778656320 is a wasteful number, since it uses less digits than its factorization.

1420778656320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479977787 (or 1479977777 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 1420778656320 in words is "one trillion, four hundred twenty billion, seven hundred seventy-eight million, six hundred fifty-six thousand, three hundred twenty".