61634501 has 4 divisors (see below), whose sum is σ = 61673100. Its totient is φ = 61595904.

The previous prime is 61634491. The next prime is 61634509. The reversal of 61634501 is 10543616.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39062500 + 22572001 = 6250^2 + 4751^2 .

It is a cyclic number.

It is not a de Polignac number, because 61634501 - 2²² = 57440197 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61634509) 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, 16796 + ... + 20133.

It is an arithmetic number, because the mean of its divisors is an integer number (15418275).

Almost surely, 2^61634501 is an apocalyptic number.

It is an amenable number.

61634501 is a deficient number, since it is larger than the sum of its proper divisors (38599).

61634501 is a wasteful number, since it uses less digits than its factorization.

61634501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38598.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 61634501 is about 7850.7643576915. The cubic root of 61634501 is about 395.0098827843.

The spelling of 61634501 in words is "sixty-one million, six hundred thirty-four thousand, five hundred one".