153661720465 has 16 divisors (see below), whose sum is σ = 203417360640. Its totient is φ = 110498312320.

The previous prime is 153661720463. The next prime is 153661720477. The reversal of 153661720465 is 564027166351.

It is not a de Polignac number, because 153661720465 - 2¹ = 153661720463 is a prime.

It is a super-2 number, since 2×153661720465² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (153661720463) 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, 15690889 + ... + 15700678.

It is an arithmetic number, because the mean of its divisors is an integer number (12713585040).

Almost surely, 2^153661720465 is an apocalyptic number.

It is an amenable number.

153661720465 is a deficient number, since it is larger than the sum of its proper divisors (49755640175).

153661720465 is a wasteful number, since it uses less digits than its factorization.

153661720465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31391672.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 153661720465 in words is "one hundred fifty-three billion, six hundred sixty-one million, seven hundred twenty thousand, four hundred sixty-five".