78149806263 has 24 divisors (see below), whose sum is σ = 117091077376. Its totient is φ = 52087779000.

The previous prime is 78149806261. The next prime is 78149806277. The reversal of 78149806263 is 36260894187.

78149806263 is a `hidden beast` number, since 7 + 8 + 1 + 4 + 9 + 8 + 0 + 626 + 3 = 666.

It is not a de Polignac number, because 78149806263 - 2¹ = 78149806261 is a prime.

It is a super-2 number, since 2×78149806263² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78149806261) 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, 1080588 + ... + 1150638.

Almost surely, 2^78149806263 is an apocalyptic number.

78149806263 is a deficient number, since it is larger than the sum of its proper divisors (38941271113).

78149806263 is an equidigital number, since it uses as much as digits as its factorization.

78149806263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74657 (or 74645 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 78149806263 in words is "seventy-eight billion, one hundred forty-nine million, eight hundred six thousand, two hundred sixty-three".