11315978617 has 8 divisors (see below), whose sum is σ = 12053373696. Its totient is φ = 10586555712.

The previous prime is 11315978593. The next prime is 11315978621. The reversal of 11315978617 is 71687951311.

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 11315978617 - 2⁷ = 11315978489 is a prime.

It is a super-3 number, since 3×11315978617³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11315978627) 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, 1990113 + ... + 1995790.

It is an arithmetic number, because the mean of its divisors is an integer number (1506671712).

Almost surely, 2^11315978617 is an apocalyptic number.

11315978617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11315978617 is a deficient number, since it is larger than the sum of its proper divisors (737395079).

11315978617 is a wasteful number, since it uses less digits than its factorization.

11315978617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986087.

The product of its digits is 317520, while the sum is 49.

The spelling of 11315978617 in words is "eleven billion, three hundred fifteen million, nine hundred seventy-eight thousand, six hundred seventeen".