61450020363 has 32 divisors (see below), whose sum is σ = 86171627520. Its totient is φ = 38915331840.

The previous prime is 61450020349. The next prime is 61450020367. The reversal of 61450020363 is 36302005416.

It is not a de Polignac number, because 61450020363 - 2⁴ = 61450020347 is a prime.

It is a super-2 number, since 2×61450020363² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61450020363.

It is not an unprimeable number, because it can be changed into a prime (61450020367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 656470 + ... + 744212.

It is an arithmetic number, because the mean of its divisors is an integer number (2692863360).

Almost surely, 2^61450020363 is an apocalyptic number.

61450020363 is a deficient number, since it is larger than the sum of its proper divisors (24721607157).

61450020363 is a wasteful number, since it uses less digits than its factorization.

61450020363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87939.

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 61450020363 its reverse (36302005416), we get a palindrome (97752025779).

The spelling of 61450020363 in words is "sixty-one billion, four hundred fifty million, twenty thousand, three hundred sixty-three".