77171963948 has 24 divisors (see below), whose sum is σ = 138367492032. Its totient is φ = 37640678544.

The previous prime is 77171963927. The next prime is 77171963969. The reversal of 77171963948 is 84936917177.

It is an interprime number because it is at equal distance from previous prime (77171963927) and next prime (77171963969).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149690 + ... + 420417.

It is an arithmetic number, because the mean of its divisors is an integer number (5765312168).

Almost surely, 2^77171963948 is an apocalyptic number.

It is an amenable number.

77171963948 is a deficient number, since it is larger than the sum of its proper divisors (61195528084).

77171963948 is a wasteful number, since it uses less digits than its factorization.

77171963948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570941 (or 570939 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 62.

The spelling of 77171963948 in words is "seventy-seven billion, one hundred seventy-one million, nine hundred sixty-three thousand, nine hundred forty-eight".