977148876722 has 18 divisors (see below), whose sum is σ = 1470176007543. Its totient is φ = 487094695584.

The previous prime is 977148876709. The next prime is 977148876749. The reversal of 977148876722 is 227678841779.

977148876722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 633601672081 + 343547204641 = 795991^2 + 586129^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=698981.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 571765604 + ... + 571767312.

Almost surely, 2^977148876722 is an apocalyptic number.

977148876722 is a deficient number, since it is larger than the sum of its proper divisors (493027130821).

977148876722 is an frugal number, since it uses more digits than its factorization.

977148876722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238 (or 2120 counting only the distinct ones).

The product of its digits is 132765696, while the sum is 68.

The spelling of 977148876722 in words is "nine hundred seventy-seven billion, one hundred forty-eight million, eight hundred seventy-six thousand, seven hundred twenty-two".