61453542136 has 16 divisors (see below), whose sum is σ = 131686161840. Its totient is φ = 26337232320.

The previous prime is 61453542133. The next prime is 61453542187. The reversal of 61453542136 is 63124535416.

It is a super-2 number, since 2×61453542136² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61453542133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548692285 + ... + 548692396.

It is an arithmetic number, because the mean of its divisors is an integer number (8230385115).

Almost surely, 2^61453542136 is an apocalyptic number.

It is an amenable number.

61453542136 is an abundant number, since it is smaller than the sum of its proper divisors (70232619704).

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

61453542136 is a wasteful number, since it uses less digits than its factorization.

61453542136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097384694 (or 1097384690 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The spelling of 61453542136 in words is "sixty-one billion, four hundred fifty-three million, five hundred forty-two thousand, one hundred thirty-six".