1173345556738 has 32 divisors (see below), whose sum is σ = 1985449645440. Its totient is φ = 517261852800.

The previous prime is 1173345556729. The next prime is 1173345556771. The reversal of 1173345556738 is 8376555433711.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18109563 + ... + 18174238.

It is an arithmetic number, because the mean of its divisors is an integer number (62045301420).

Almost surely, 2^{1173345556738} is an apocalyptic number.

1173345556738 is a deficient number, since it is larger than the sum of its proper divisors (812104088702).

1173345556738 is a wasteful number, since it uses less digits than its factorization.

1173345556738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36283882.

The product of its digits is 31752000, while the sum is 58.

The spelling of 1173345556738 in words is "one trillion, one hundred seventy-three billion, three hundred forty-five million, five hundred fifty-six thousand, seven hundred thirty-eight".