27778377950973 has 32 divisors (see below), whose sum is σ = 44324522506880. Its totient is φ = 17092171324800.

The previous prime is 27778377950929. The next prime is 27778377950993. The reversal of 27778377950973 is 37905977387772.

27778377950973 is a `hidden beast` number, since 2 + 7 + 7 + 7 + 8 + 37 + 7 + 9 + 509 + 73 = 666.

It is not a de Polignac number, because 27778377950973 - 2⁹ = 27778377950461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27778377950892 and 27778377950901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27778377950993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2412928 + ... + 7834473.

It is an arithmetic number, because the mean of its divisors is an integer number (1385141328340).

Almost surely, 2^{27778377950973} is an apocalyptic number.

It is an amenable number.

27778377950973 is a deficient number, since it is larger than the sum of its proper divisors (16546144555907).

27778377950973 is a wasteful number, since it uses less digits than its factorization.

27778377950973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10255146 (or 10255140 counting only the distinct ones).

The product of its (nonzero) digits is 6861289680, while the sum is 81.

The spelling of 27778377950973 in words is "twenty-seven trillion, seven hundred seventy-eight billion, three hundred seventy-seven million, nine hundred fifty thousand, nine hundred seventy-three".