161134521403657 has 16 divisors (see below), whose sum is σ = 174505033341760. Its totient is φ = 148315406545152.

The previous prime is 161134521403649. The next prime is 161134521403679. The reversal of 161134521403657 is 756304125431161.

It is not a de Polignac number, because 161134521403657 - 2³ = 161134521403649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161134521403657.

It is not an unprimeable number, because it can be changed into a prime (161134521403637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866883588 + ... + 867069445.

It is an arithmetic number, because the mean of its divisors is an integer number (10906564583860).

Almost surely, 2^{161134521403657} is an apocalyptic number.

It is an amenable number.

161134521403657 is a deficient number, since it is larger than the sum of its proper divisors (13370511938103).

161134521403657 is a wasteful number, since it uses less digits than its factorization.

161134521403657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733953192.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 161134521403657 in words is "one hundred sixty-one trillion, one hundred thirty-four billion, five hundred twenty-one million, four hundred three thousand, six hundred fifty-seven".