61545656371 has 4 divisors (see below), whose sum is σ = 61546170592. Its totient is φ = 61545142152.

The previous prime is 61545656351. The next prime is 61545656413. The reversal of 61545656371 is 17365654516.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61545656371 - 2⁹ = 61545655859 is a prime.

It is a super-3 number, since 3×61545656371³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61545656351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27265 + ... + 351901.

It is an arithmetic number, because the mean of its divisors is an integer number (15386542648).

Almost surely, 2^61545656371 is an apocalyptic number.

61545656371 is a deficient number, since it is larger than the sum of its proper divisors (514221).

61545656371 is a wasteful number, since it uses less digits than its factorization.

61545656371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514220.

The product of its digits is 2268000, while the sum is 49.

The spelling of 61545656371 in words is "sixty-one billion, five hundred forty-five million, six hundred fifty-six thousand, three hundred seventy-one".