61516623406 has 48 divisors (see below), whose sum is σ = 109492750080. Its totient is φ = 25838310960.

The previous prime is 61516623403. The next prime is 61516623431. The reversal of 61516623406 is 60432661516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61516623401) by changing a digit.

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, 1897771 + ... + 1929913.

It is an arithmetic number, because the mean of its divisors is an integer number (2281098960).

Almost surely, 2^61516623406 is an apocalyptic number.

61516623406 is a deficient number, since it is larger than the sum of its proper divisors (47976126674).

61516623406 is a wasteful number, since it uses less digits than its factorization.

61516623406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32549 (or 32542 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 61516623406 in words is "sixty-one billion, five hundred sixteen million, six hundred twenty-three thousand, four hundred six".