77294291906 has 24 divisors (see below), whose sum is σ = 125586800244. Its totient is φ = 35662710720.

The previous prime is 77294291891. The next prime is 77294291917. The reversal of 77294291906 is 60919249277.

It can be written as a sum of positive squares in 6 ways, for example, as 4507108225 + 72787183681 = 67135^2 + 269791^2 .

It is a super-2 number, since 2×77294291906² (a number of 23 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, 1053200 + ... + 1124196.

Almost surely, 2^77294291906 is an apocalyptic number.

77294291906 is a deficient number, since it is larger than the sum of its proper divisors (48292508338).

77294291906 is a wasteful number, since it uses less digits than its factorization.

77294291906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74246 (or 74233 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 77294291906 in words is "seventy-seven billion, two hundred ninety-four million, two hundred ninety-one thousand, nine hundred six".