8154778779103 has 12 divisors (see below), whose sum is σ = 9490782888720. Its totient is φ = 6977350825280.

The previous prime is 8154778779089. The next prime is 8154778779127. The reversal of 8154778779103 is 3019778774518.

It is not a de Polignac number, because 8154778779103 - 2¹³ = 8154778770911 is a prime.

It is a super-2 number, since 2×8154778779103² (a number of 27 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 (8154778773103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1982199883 + ... + 1982203996.

It is an arithmetic number, because the mean of its divisors is an integer number (790898574060).

Almost surely, 2^{8154778779103} is an apocalyptic number.

8154778779103 is a deficient number, since it is larger than the sum of its proper divisors (1336004109617).

8154778779103 is a wasteful number, since it uses less digits than its factorization.

8154778779103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964403918 (or 3964403907 counting only the distinct ones).

The product of its (nonzero) digits is 82978560, while the sum is 67.

The spelling of 8154778779103 in words is "eight trillion, one hundred fifty-four billion, seven hundred seventy-eight million, seven hundred seventy-nine thousand, one hundred three".