1208778361847 has 8 divisors (see below), whose sum is σ = 1381473071616. Its totient is φ = 1036086673752.

The previous prime is 1208778361757. The next prime is 1208778361849. The reversal of 1208778361847 is 7481638778021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1208778361847 - 2¹² = 1208778357751 is a prime.

It is a super-2 number, since 2×1208778361847² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1208778361847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1208778361849) 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, 178838 + ... + 1565100.

It is an arithmetic number, because the mean of its divisors is an integer number (172684133952).

Almost surely, 2^{1208778361847} is an apocalyptic number.

1208778361847 is a deficient number, since it is larger than the sum of its proper divisors (172694709769).

1208778361847 is a wasteful number, since it uses less digits than its factorization.

1208778361847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510837.

The product of its (nonzero) digits is 25288704, while the sum is 62.

The spelling of 1208778361847 in words is "one trillion, two hundred eight billion, seven hundred seventy-eight million, three hundred sixty-one thousand, eight hundred forty-seven".