77137402265225 has 12 divisors (see below), whose sum is σ = 95688320330460. Its totient is φ = 61685443411200.

The previous prime is 77137402265219. The next prime is 77137402265251. The reversal of 77137402265225 is 52256220473177.

It can be written as a sum of positive squares in 6 ways, for example, as 21707054400889 + 55430347864336 = 4659083^2 + 7445156^2 .

It is not a de Polignac number, because 77137402265225 - 2³² = 77133107297929 is a prime.

It is a super-2 number, since 2×77137402265225² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611895740 + ... + 612021789.

It is an arithmetic number, because the mean of its divisors is an integer number (7974026694205).

Almost surely, 2^{77137402265225} is an apocalyptic number.

It is an amenable number.

77137402265225 is a deficient number, since it is larger than the sum of its proper divisors (18550918065235).

77137402265225 is a wasteful number, since it uses less digits than its factorization.

77137402265225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223920060 (or 1223920055 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 53.

The spelling of 77137402265225 in words is "seventy-seven trillion, one hundred thirty-seven billion, four hundred two million, two hundred sixty-five thousand, two hundred twenty-five".