3149954085721 has 9 divisors (see below), whose sum is σ = 3210604436991. Its totient is φ = 3090428699592.

The previous prime is 3149954085653. The next prime is 3149954085731. The reversal of 3149954085721 is 1275804599413.

The square root of 3149954085721 is 1774811.

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

It can be written as a sum of positive squares in only one way, i.e., 2270792817225 + 879161268496 = 1506915^2 + 937636^2 .

It is not a de Polignac number, because 3149954085721 - 2²¹ = 3149951988569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3149954085731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 94048240 + ... + 94081726.

Almost surely, 2^{3149954085721} is an apocalyptic number.

3149954085721 is the 1774811-st square number.

3149954085721 is the 887406-th centered octagonal number.

It is an amenable number.

3149954085721 is a deficient number, since it is larger than the sum of its proper divisors (60650351270).

3149954085721 is an frugal number, since it uses more digits than its factorization.

3149954085721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67080 (or 33540 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 3149954085721 in words is "three trillion, one hundred forty-nine billion, nine hundred fifty-four million, eighty-five thousand, seven hundred twenty-one".