2651971389377 has 4 divisors (see below), whose sum is σ = 2652121126020. Its totient is φ = 2651821652736.

The previous prime is 2651971389373. The next prime is 2651971389421. The reversal of 2651971389377 is 7739831791562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2449400283136 + 202571106241 = 1565056^2 + 450079^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651971389377 - 2² = 2651971389373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2651971389373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74841752 + ... + 74877177.

It is an arithmetic number, because the mean of its divisors is an integer number (663030281505).

Almost surely, 2^{2651971389377} is an apocalyptic number.

It is an amenable number.

2651971389377 is a deficient number, since it is larger than the sum of its proper divisors (149736643).

2651971389377 is a wasteful number, since it uses less digits than its factorization.

2651971389377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149736642.

The product of its digits is 120022560, while the sum is 68.

The spelling of 2651971389377 in words is "two trillion, six hundred fifty-one billion, nine hundred seventy-one million, three hundred eighty-nine thousand, three hundred seventy-seven".