78901011 has 24 divisors (see below), whose sum is σ = 130700544. Its totient is φ = 44930160.

The previous prime is 78900989. The next prime is 78901019. The reversal of 78901011 is 11010987.

It is not a de Polignac number, because 78901011 - 2⁹ = 78900499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78901019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17580 + ... + 21606.

It is an arithmetic number, because the mean of its divisors is an integer number (5445856).

Almost surely, 2^78901011 is an apocalyptic number.

78901011 is a deficient number, since it is larger than the sum of its proper divisors (51799533).

78901011 is a wasteful number, since it uses less digits than its factorization.

78901011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4351 (or 4348 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 78901011 is about 8882.6241055220. The cubic root of 78901011 is about 428.9047500729.

Adding to 78901011 its reverse (11010987), we get a palindrome (89911998).

The spelling of 78901011 in words is "seventy-eight million, nine hundred one thousand, eleven".