78238148049 has 8 divisors (see below), whose sum is σ = 115908367520. Its totient is φ = 52158765348.

The previous prime is 78238148011. The next prime is 78238148059. The reversal of 78238148049 is 94084183287.

It is a happy number.

78238148049 is a `hidden beast` number, since 7 + 82 + 3 + 81 + 480 + 4 + 9 = 666.

It is not a de Polignac number, because 78238148049 - 2¹¹ = 78238146001 is a prime.

It is a super-2 number, since 2×78238148049² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78238147986 and 78238148004.

It is not an unprimeable number, because it can be changed into a prime (78238148059) 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, 1448854567 + ... + 1448854620.

It is an arithmetic number, because the mean of its divisors is an integer number (14488545940).

Almost surely, 2^78238148049 is an apocalyptic number.

It is an amenable number.

78238148049 is a deficient number, since it is larger than the sum of its proper divisors (37670219471).

78238148049 is a wasteful number, since it uses less digits than its factorization.

78238148049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897709196 (or 2897709190 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 78238148049 in words is "seventy-eight billion, two hundred thirty-eight million, one hundred forty-eight thousand, forty-nine".