1270778379285 has 32 divisors (see below), whose sum is σ = 2045339936640. Its totient is φ = 673728807168.

The previous prime is 1270778379271. The next prime is 1270778379293. The reversal of 1270778379285 is 5829738770721.

It is not a de Polignac number, because 1270778379285 - 2¹² = 1270778375189 is a prime.

It is a super-2 number, since 2×1270778379285² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1347751 + ... + 2087579.

It is an arithmetic number, because the mean of its divisors is an integer number (63916873020).

Almost surely, 2^{1270778379285} is an apocalyptic number.

1270778379285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1270778379285 is a deficient number, since it is larger than the sum of its proper divisors (774561557355).

1270778379285 is a wasteful number, since it uses less digits than its factorization.

1270778379285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740517.

The product of its (nonzero) digits is 82978560, while the sum is 66.

The spelling of 1270778379285 in words is "one trillion, two hundred seventy billion, seven hundred seventy-eight million, three hundred seventy-nine thousand, two hundred eighty-five".