61436061021 has 8 divisors (see below), whose sum is σ = 83036868160. Its totient is φ = 40396313952.

The previous prime is 61436061019. The next prime is 61436061023. The reversal of 61436061021 is 12016063416.

It is an interprime number because it is at equal distance from previous prime (61436061019) and next prime (61436061023).

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

It is not a de Polignac number, because 61436061021 - 2¹ = 61436061019 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 61436061021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61436061023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140264761 + ... + 140265198.

It is an arithmetic number, because the mean of its divisors is an integer number (10379608520).

Almost surely, 2^61436061021 is an apocalyptic number.

It is an amenable number.

61436061021 is a deficient number, since it is larger than the sum of its proper divisors (21600807139).

61436061021 is a wasteful number, since it uses less digits than its factorization.

61436061021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280530035.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 61436061021 in words is "sixty-one billion, four hundred thirty-six million, sixty-one thousand, twenty-one".