117678499849 has 15 divisors (see below), whose sum is σ = 125138742337. Its totient is φ = 110662927456.

The previous prime is 117678499837. The next prime is 117678499859. The reversal of 117678499849 is 948994876711.

The square root of 117678499849 is 343043.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 36521885449 + 81156614400 = 191107^2 + 284880^2 .

It is not a de Polignac number, because 117678499849 - 2³¹ = 115531016201 is a prime.

It is a super-2 number, since 2×117678499849² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117678499859) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 99138834 + ... + 99140020.

Almost surely, 2^117678499849 is an apocalyptic number.

117678499849 is the 343043-rd square number.

117678499849 is the 171522-nd centered octagonal number.

It is an amenable number.

117678499849 is a deficient number, since it is larger than the sum of its proper divisors (7460242488).

117678499849 is an frugal number, since it uses more digits than its factorization.

117678499849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2442 (or 1204 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 73.

The spelling of 117678499849 in words is "one hundred seventeen billion, six hundred seventy-eight million, four hundred ninety-nine thousand, eight hundred forty-nine".