61647715390 has 32 divisors (see below), whose sum is σ = 113993305920. Its totient is φ = 23986658304.

The previous prime is 61647715369. The next prime is 61647715399. The reversal of 61647715390 is 9351774616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61647715399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1651351 + ... + 1688269.

It is an arithmetic number, because the mean of its divisors is an integer number (3562290810).

Almost surely, 2^61647715390 is an apocalyptic number.

61647715390 is a deficient number, since it is larger than the sum of its proper divisors (52345590530).

61647715390 is a wasteful number, since it uses less digits than its factorization.

61647715390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41476.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 61647715390 in words is "sixty-one billion, six hundred forty-seven million, seven hundred fifteen thousand, three hundred ninety".