3733948697981 has 2 divisors, whose sum is σ = 3733948697982. Its totient is φ = 3733948697980.

The previous prime is 3733948697971. The next prime is 3733948698049. The reversal of 3733948697981 is 1897968493373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3619411125625 + 114537572356 = 1902475^2 + 338434^2 .

It is a cyclic number.

It is not a de Polignac number, because 3733948697981 - 2⁶ = 3733948697917 is a prime.

It is a super-2 number, since 2×3733948697981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3733948697911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1866974348990 + 1866974348991.

It is an arithmetic number, because the mean of its divisors is an integer number (1866974348991).

Almost surely, 2^{3733948697981} is an apocalyptic number.

It is an amenable number.

3733948697981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3733948697981 is an equidigital number, since it uses as much as digits as its factorization.

3733948697981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481421312, while the sum is 77.

The spelling of 3733948697981 in words is "three trillion, seven hundred thirty-three billion, nine hundred forty-eight million, six hundred ninety-seven thousand, nine hundred eighty-one".