2978522787951 has 20 divisors (see below), whose sum is σ = 4456586356200. Its totient is φ = 1982473938576.

The previous prime is 2978522787949. The next prime is 2978522787953. The reversal of 2978522787951 is 1597872258792.

2978522787951 is a `hidden beast` number, since 2 + 9 + 7 + 8 + 522 + 7 + 8 + 7 + 95 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2978522787949) and next prime (2978522787953).

It is not a de Polignac number, because 2978522787951 - 2¹ = 2978522787949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2978522787951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978522787953) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29652516 + ... + 29752793.

It is an arithmetic number, because the mean of its divisors is an integer number (222829317810).

Almost surely, 2^{2978522787951} is an apocalyptic number.

2978522787951 is a deficient number, since it is larger than the sum of its proper divisors (1478063568249).

2978522787951 is an equidigital number, since it uses as much as digits as its factorization.

2978522787951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59405940 (or 59405931 counting only the distinct ones).

The product of its digits is 355622400, while the sum is 72.

It can be divided in two parts, 297852 and 2787951, that added together give a palindrome (3085803).

The spelling of 2978522787951 in words is "two trillion, nine hundred seventy-eight billion, five hundred twenty-two million, seven hundred eighty-seven thousand, nine hundred fifty-one".