61515548163696 has 160 divisors (see below), whose sum is σ = 183736461542400. Its totient is φ = 17527652720640.

The previous prime is 61515548163691. The next prime is 61515548163733. The reversal of 61515548163696 is 69636184551516.

It is a happy number.

It is a super-2 number, since 2×61515548163696² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61515548163691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6028020 + ... + 12624108.

It is an arithmetic number, because the mean of its divisors is an integer number (1148352884640).

Almost surely, 2^{61515548163696} is an apocalyptic number.

61515548163696 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61515548163696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91868230771200).

61515548163696 is an abundant number, since it is smaller than the sum of its proper divisors (122220913378704).

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

61515548163696 is a wasteful number, since it uses less digits than its factorization.

61515548163696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6597167 (or 6597161 counting only the distinct ones).

The product of its digits is 139968000, while the sum is 66.

The spelling of 61515548163696 in words is "sixty-one trillion, five hundred fifteen billion, five hundred forty-eight million, one hundred sixty-three thousand, six hundred ninety-six".