61531667334 has 48 divisors (see below), whose sum is σ = 141628490640. Its totient is φ = 20010291840.

The previous prime is 61531667311. The next prime is 61531667359. The reversal of 61531667334 is 43376613516.

61531667334 is a `hidden beast` number, since 6 + 153 + 166 + 7 + 334 = 666.

It is a super-2 number, since 2×61531667334² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61531667334.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1524079 + ... + 1563930.

It is an arithmetic number, because the mean of its divisors is an integer number (2950593555).

Almost surely, 2^61531667334 is an apocalyptic number.

61531667334 is an abundant number, since it is smaller than the sum of its proper divisors (80096823306).

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

61531667334 is a wasteful number, since it uses less digits than its factorization.

61531667334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088067 (or 3088055 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The spelling of 61531667334 in words is "sixty-one billion, five hundred thirty-one million, six hundred sixty-seven thousand, three hundred thirty-four".