61657640451159 has 16 divisors (see below), whose sum is σ = 83058740808960. Its totient is φ = 40680827331840.

The previous prime is 61657640451157. The next prime is 61657640451167. The reversal of 61657640451159 is 95115404675616.

61657640451159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61657640451159 - 2¹ = 61657640451157 is a prime.

It is a super-2 number, since 2×61657640451159² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61657640451157) 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, 23072304 + ... + 25605594.

It is an arithmetic number, because the mean of its divisors is an integer number (5191171300560).

Almost surely, 2^{61657640451159} is an apocalyptic number.

61657640451159 is a deficient number, since it is larger than the sum of its proper divisors (21401100357801).

61657640451159 is a wasteful number, since it uses less digits than its factorization.

61657640451159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617030.

The product of its (nonzero) digits is 27216000, while the sum is 60.

The spelling of 61657640451159 in words is "sixty-one trillion, six hundred fifty-seven billion, six hundred forty million, four hundred fifty-one thousand, one hundred fifty-nine".