61620535153 has 16 divisors (see below), whose sum is σ = 64033494784. Its totient is φ = 59248765440.

The previous prime is 61620535133. The next prime is 61620535157. The reversal of 61620535153 is 35153502616.

It is a cyclic number.

It is not a de Polignac number, because 61620535153 - 2²⁹ = 61083664241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61620535157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2467576 + ... + 2492422.

It is an arithmetic number, because the mean of its divisors is an integer number (4002093424).

Almost surely, 2^61620535153 is an apocalyptic number.

It is an amenable number.

61620535153 is a deficient number, since it is larger than the sum of its proper divisors (2412959631).

61620535153 is a wasteful number, since it uses less digits than its factorization.

61620535153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25672.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 61620535153 in words is "sixty-one billion, six hundred twenty million, five hundred thirty-five thousand, one hundred fifty-three".