1420778656654 has 16 divisors (see below), whose sum is σ = 2435715967968. Its totient is φ = 608881285152.

The previous prime is 1420778656651. The next prime is 1420778656691. The reversal of 1420778656654 is 4566568770241.

It is a super-2 number, since 2×1420778656654² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1420778656592 and 1420778656601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420778656651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1615237 + ... + 2334640.

It is an arithmetic number, because the mean of its divisors is an integer number (152232247998).

Almost surely, 2^{1420778656654} is an apocalyptic number.

1420778656654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1420778656654 is a deficient number, since it is larger than the sum of its proper divisors (1014937311314).

1420778656654 is a wasteful number, since it uses less digits than its factorization.

1420778656654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975579.

The product of its (nonzero) digits is 67737600, while the sum is 61.

The spelling of 1420778656654 in words is "one trillion, four hundred twenty billion, seven hundred seventy-eight million, six hundred fifty-six thousand, six hundred fifty-four".