61436043652 has 12 divisors (see below), whose sum is σ = 108499435660. Its totient is φ = 30436204896.

The previous prime is 61436043637. The next prime is 61436043671. The reversal of 61436043652 is 25634063416.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30875409796 + 30560633856 = 175714^2 + 174816^2 .

It is a super-2 number, since 2×61436043652² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 70453743 + ... + 70454614.

Almost surely, 2^61436043652 is an apocalyptic number.

It is an amenable number.

61436043652 is a deficient number, since it is larger than the sum of its proper divisors (47063392008).

61436043652 is a wasteful number, since it uses less digits than its factorization.

61436043652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140908470 (or 140908468 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 61436043652 in words is "sixty-one billion, four hundred thirty-six million, forty-three thousand, six hundred fifty-two".