1157207761217 has 4 divisors (see below), whose sum is σ = 1218113432880. Its totient is φ = 1096302089556.

The previous prime is 1157207761139. The next prime is 1157207761247. The reversal of 1157207761217 is 7121677027511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1157207761217 - 2¹⁶ = 1157207695681 is a prime.

It is a super-2 number, since 2×1157207761217² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157207761247) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30452835803 + ... + 30452835840.

It is an arithmetic number, because the mean of its divisors is an integer number (304528358220).

Almost surely, 2^{1157207761217} is an apocalyptic number.

It is an amenable number.

1157207761217 is a deficient number, since it is larger than the sum of its proper divisors (60905671663).

1157207761217 is an equidigital number, since it uses as much as digits as its factorization.

1157207761217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60905671662.

The product of its (nonzero) digits is 288120, while the sum is 47.

The spelling of 1157207761217 in words is "one trillion, one hundred fifty-seven billion, two hundred seven million, seven hundred sixty-one thousand, two hundred seventeen".