153655681 has 2 divisors, whose sum is σ = 153655682. Its totient is φ = 153655680.

The previous prime is 153655669. The next prime is 153655757. The reversal of 153655681 is 186556351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116445681 + 37210000 = 10791^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 153655681 - 2¹³ = 153647489 is a prime.

It is a super-2 number, since 2×153655681² = 47220136607147522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (153655181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76827840 + 76827841.

It is an arithmetic number, because the mean of its divisors is an integer number (76827841).

Almost surely, 2^153655681 is an apocalyptic number.

It is an amenable number.

153655681 is a deficient number, since it is larger than the sum of its proper divisors (1).

153655681 is an equidigital number, since it uses as much as digits as its factorization.

153655681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 40.

The square root of 153655681 is about 12395.7928750040. The cubic root of 153655681 is about 535.6110652617.

The spelling of 153655681 in words is "one hundred fifty-three million, six hundred fifty-five thousand, six hundred eighty-one".