61701621 has 8 divisors (see below), whose sum is σ = 82373760. Its totient is φ = 41081952.

The previous prime is 61701613. The next prime is 61701631. The reversal of 61701621 is 12610716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61701621 - 2³ = 61701613 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61701591 and 61701600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61701631) 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 7 ways as a sum of consecutive naturals, for example, 10285 + ... + 15138.

It is an arithmetic number, because the mean of its divisors is an integer number (10296720).

Almost surely, 2^61701621 is an apocalyptic number.

It is an amenable number.

61701621 is a deficient number, since it is larger than the sum of its proper divisors (20672139).

61701621 is a wasteful number, since it uses less digits than its factorization.

61701621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26235.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 61701621 is about 7855.0379375277. The cubic root of 61701621 is about 395.1532194138.

The spelling of 61701621 in words is "sixty-one million, seven hundred one thousand, six hundred twenty-one".