61672936563 has 24 divisors (see below), whose sum is σ = 101973830400. Its totient is φ = 35184722544.

The previous prime is 61672936561. The next prime is 61672936571. The reversal of 61672936563 is 36563927616.

61672936563 is a `hidden beast` number, since 6 + 1 + 6 + 72 + 9 + 3 + 6 + 563 = 666.

It is not a de Polignac number, because 61672936563 - 2¹ = 61672936561 is a prime.

It is a super-2 number, since 2×61672936563² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61672936561) 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 23 ways as a sum of consecutive naturals, for example, 751743 + ... + 829736.

It is an arithmetic number, because the mean of its divisors is an integer number (4248909600).

Almost surely, 2^61672936563 is an apocalyptic number.

61672936563 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61672936563 is a deficient number, since it is larger than the sum of its proper divisors (40300893837).

61672936563 is a wasteful number, since it uses less digits than its factorization.

61672936563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582111 (or 1582108 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The spelling of 61672936563 in words is "sixty-one billion, six hundred seventy-two million, nine hundred thirty-six thousand, five hundred sixty-three".