61549666694516 has 48 divisors (see below), whose sum is σ = 144620195879040. Its totient is φ = 22135744264320.

The previous prime is 61549666694441. The next prime is 61549666694533.

61549666694516 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×61549666694516² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7686018311 + ... + 7686026318.

It is an arithmetic number, because the mean of its divisors is an integer number (3012920747480).

Almost surely, 2^{61549666694516} is an apocalyptic number.

It is an amenable number.

61549666694516 is an abundant number, since it is smaller than the sum of its proper divisors (83070529184524).

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

61549666694516 is a wasteful number, since it uses less digits than its factorization.

61549666694516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15372044664 (or 15372044662 counting only the distinct ones).

The product of its digits is 1511654400, while the sum is 74.

The spelling of 61549666694516 in words is "sixty-one trillion, five hundred forty-nine billion, six hundred sixty-six million, six hundred ninety-four thousand, five hundred sixteen".