61864901 has 12 divisors (see below), whose sum is σ = 72608652. Its totient is φ = 52553088.

The previous prime is 61864877. The next prime is 61864909. The reversal of 61864901 is 10946816.

It can be written as a sum of positive squares in 2 ways, for example, as 11383876 + 50481025 = 3374^2 + 7105^2 .

It is not a de Polignac number, because 61864901 - 2⁶ = 61864837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61864909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50 + ... + 11123.

It is an arithmetic number, because the mean of its divisors is an integer number (6050721).

Almost surely, 2^61864901 is an apocalyptic number.

It is an amenable number.

61864901 is a deficient number, since it is larger than the sum of its proper divisors (10743751).

61864901 is a wasteful number, since it uses less digits than its factorization.

61864901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11300 (or 11293 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 61864901 is about 7865.4244005012. The cubic root of 61864901 is about 395.5014749208.

The spelling of 61864901 in words is "sixty-one million, eight hundred sixty-four thousand, nine hundred one".