77027172146 has 4 divisors (see below), whose sum is σ = 115540758222. Its totient is φ = 38513586072.

The previous prime is 77027172121. The next prime is 77027172149. The reversal of 77027172146 is 64127172077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 58182746521 + 18844425625 = 241211^2 + 137275^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77027172097 and 77027172106.

It is not an unprimeable number, because it can be changed into a prime (77027172149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19256793035 + ... + 19256793038.

Almost surely, 2^77027172146 is an apocalyptic number.

77027172146 is a deficient number, since it is larger than the sum of its proper divisors (38513586076).

77027172146 is a wasteful number, since it uses less digits than its factorization.

77027172146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38513586075.

The product of its (nonzero) digits is 230496, while the sum is 44.

The spelling of 77027172146 in words is "seventy-seven billion, twenty-seven million, one hundred seventy-two thousand, one hundred forty-six".