1172117746978 has 16 divisors (see below), whose sum is σ = 1779754013856. Its totient is φ = 578869540480.

The previous prime is 1172117746861. The next prime is 1172117747011. The reversal of 1172117746978 is 8796477112711.

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 7 ways as a sum of consecutive naturals, for example, 29743 + ... + 1531378.

It is an arithmetic number, because the mean of its divisors is an integer number (111234625866).

Almost surely, 2^{1172117746978} is an apocalyptic number.

1172117746978 is a deficient number, since it is larger than the sum of its proper divisors (607636266878).

1172117746978 is a wasteful number, since it uses less digits than its factorization.

1172117746978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565729.

The product of its digits is 8297856, while the sum is 61.

The spelling of 1172117746978 in words is "one trillion, one hundred seventy-two billion, one hundred seventeen million, seven hundred forty-six thousand, nine hundred seventy-eight".