61263164427 has 4 divisors (see below), whose sum is σ = 81684219240. Its totient is φ = 40842109616.

The previous prime is 61263164407. The next prime is 61263164447. The reversal of 61263164427 is 72446136216.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61263164407) and next prime (61263164447).

It is a cyclic number.

It is not a de Polignac number, because 61263164427 - 2¹¹ = 61263162379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61263164407) 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, 10210527402 + ... + 10210527407.

It is an arithmetic number, because the mean of its divisors is an integer number (20421054810).

Almost surely, 2^61263164427 is an apocalyptic number.

61263164427 is a deficient number, since it is larger than the sum of its proper divisors (20421054813).

61263164427 is a wasteful number, since it uses less digits than its factorization.

61263164427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20421054812.

The product of its digits is 290304, while the sum is 42.

The spelling of 61263164427 in words is "sixty-one billion, two hundred sixty-three million, one hundred sixty-four thousand, four hundred twenty-seven".