1156778990767 has 8 divisors (see below), whose sum is σ = 1207190930400. Its totient is φ = 1106376817920.

The previous prime is 1156778990743. The next prime is 1156778990771. The reversal of 1156778990767 is 7670998776511.

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 1156778990767 - 2¹⁹ = 1156778466479 is a prime.

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 1156778990767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156778990707) 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, 2199142 + ... + 2673907.

It is an arithmetic number, because the mean of its divisors is an integer number (150898866300).

Almost surely, 2^{1156778990767} is an apocalyptic number.

1156778990767 is a deficient number, since it is larger than the sum of its proper divisors (50411939633).

1156778990767 is a wasteful number, since it uses less digits than its factorization.

1156778990767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4883393.

The product of its (nonzero) digits is 280052640, while the sum is 73.

The spelling of 1156778990767 in words is "one trillion, one hundred fifty-six billion, seven hundred seventy-eight million, nine hundred ninety thousand, seven hundred sixty-seven".