153961923691 has 2 divisors, whose sum is σ = 153961923692. Its totient is φ = 153961923690.

The previous prime is 153961923671. The next prime is 153961923697. The reversal of 153961923691 is 196329169351.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 153961923691 - 2⁵ = 153961923659 is a prime.

It is not a weakly prime, because it can be changed into another prime (153961923697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76980961845 + 76980961846.

It is an arithmetic number, because the mean of its divisors is an integer number (76980961846).

Almost surely, 2^153961923691 is an apocalyptic number.

153961923691 is a deficient number, since it is larger than the sum of its proper divisors (1).

153961923691 is an equidigital number, since it uses as much as digits as its factorization.

153961923691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2361960, while the sum is 55.

The spelling of 153961923691 in words is "one hundred fifty-three billion, nine hundred sixty-one million, nine hundred twenty-three thousand, six hundred ninety-one".