61436229764 has 48 divisors (see below), whose sum is σ = 132383693568. Its totient is φ = 24293513088.

The previous prime is 61436229761. The next prime is 61436229769. The reversal of 61436229764 is 46792263416.

It is a super-2 number, since 2×61436229764² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61436229761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797849 + ... + 871455.

It is an arithmetic number, because the mean of its divisors is an integer number (2757993616).

Almost surely, 2^61436229764 is an apocalyptic number.

It is an amenable number.

61436229764 is an abundant number, since it is smaller than the sum of its proper divisors (70947463804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61436229764 is a wasteful number, since it uses less digits than its factorization.

61436229764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75924 (or 75922 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 50.

The spelling of 61436229764 in words is "sixty-one billion, four hundred thirty-six million, two hundred twenty-nine thousand, seven hundred sixty-four".