61366632501 has 4 divisors (see below), whose sum is σ = 81822176672. Its totient is φ = 40911088332.

The previous prime is 61366632493. The next prime is 61366632517. The reversal of 61366632501 is 10523666316.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61366632501 - 2³ = 61366632493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61366632501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61366632601) 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, 10227772081 + ... + 10227772086.

It is an arithmetic number, because the mean of its divisors is an integer number (20455544168).

Almost surely, 2^61366632501 is an apocalyptic number.

It is an amenable number.

61366632501 is a deficient number, since it is larger than the sum of its proper divisors (20455544171).

61366632501 is a wasteful number, since it uses less digits than its factorization.

61366632501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20455544170.

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 61366632501 in words is "sixty-one billion, three hundred sixty-six million, six hundred thirty-two thousand, five hundred one".