61233132545 has 16 divisors (see below), whose sum is σ = 80429300112. Its totient is φ = 44477026560.

The previous prime is 61233132449. The next prime is 61233132557. The reversal of 61233132545 is 54523133216.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 34721477569 + 26511654976 = 186337^2 + 162824^2 .

It is not a de Polignac number, because 61233132545 - 2²² = 61228938241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7717742 + ... + 7725671.

It is an arithmetic number, because the mean of its divisors is an integer number (5026831257).

Almost surely, 2^61233132545 is an apocalyptic number.

61233132545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61233132545 is a deficient number, since it is larger than the sum of its proper divisors (19196167567).

61233132545 is a wasteful number, since it uses less digits than its factorization.

61233132545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15443492.

The product of its digits is 64800, while the sum is 35.

The spelling of 61233132545 in words is "sixty-one billion, two hundred thirty-three million, one hundred thirty-two thousand, five hundred forty-five".