3951261377284 has 45 divisors (see below), whose sum is σ = 7492186817241. Its totient is φ = 1823349003840.

The previous prime is 3951261377207. The next prime is 3951261377333. The reversal of 3951261377284 is 4827731621593.

The square root of 3951261377284 is 1987778.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 3436656007684 + 514605369600 = 1853822^2 + 717360^2 .

It is a super-2 number, since 2×3951261377284² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 671866024 + ... + 671871904.

Almost surely, 2^{3951261377284} is an apocalyptic number.

3951261377284 is the 1987778-th square number.

It is an amenable number.

3951261377284 is a deficient number, since it is larger than the sum of its proper divisors (3540925439957).

3951261377284 is an frugal number, since it uses more digits than its factorization.

3951261377284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11818 (or 5896 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 58.

The spelling of 3951261377284 in words is "three trillion, nine hundred fifty-one billion, two hundred sixty-one million, three hundred seventy-seven thousand, two hundred eighty-four".