118728198477 has 12 divisors (see below), whose sum is σ = 195995756320. Its totient is φ = 67844684808.

The previous prime is 118728198467. The next prime is 118728198481. The reversal of 118728198477 is 774891827811.

118728198477 is a `hidden beast` number, since 1 + 1 + 8 + 72 + 8 + 1 + 98 + 477 = 666.

It is not a de Polignac number, because 118728198477 - 2⁷ = 118728198349 is a prime.

It is a super-2 number, since 2×118728198477² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 1884574579 = 118728198477 / (1 + 1 + 8 + 7 + 2 + 8 + 1 + 9 + 8 + 4 + 7 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118728198427) 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, 942287227 + ... + 942287352.

Almost surely, 2^118728198477 is an apocalyptic number.

It is an amenable number.

118728198477 is a deficient number, since it is larger than the sum of its proper divisors (77267557843).

118728198477 is a wasteful number, since it uses less digits than its factorization.

118728198477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884574592 (or 1884574589 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 63.

The spelling of 118728198477 in words is "one hundred eighteen billion, seven hundred twenty-eight million, one hundred ninety-eight thousand, four hundred seventy-seven".