61620460159 has 4 divisors (see below), whose sum is σ = 61628600304. Its totient is φ = 61612320016.

The previous prime is 61620460129. The next prime is 61620460177. The reversal of 61620460159 is 95106402616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61620460159 - 2²⁹ = 61083589247 is a prime.

It is a super-2 number, since 2×61620460159² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620460129) 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 3 ways as a sum of consecutive naturals, for example, 4058707 + ... + 4073860.

It is an arithmetic number, because the mean of its divisors is an integer number (15407150076).

Almost surely, 2^61620460159 is an apocalyptic number.

61620460159 is a deficient number, since it is larger than the sum of its proper divisors (8140145).

61620460159 is an equidigital number, since it uses as much as digits as its factorization.

61620460159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140144.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 61620460159 in words is "sixty-one billion, six hundred twenty million, four hundred sixty thousand, one hundred fifty-nine".