61650403621 has 16 divisors (see below), whose sum is σ = 64089744768. Its totient is φ = 59257440000.

The previous prime is 61650403583. The next prime is 61650403637. The reversal of 61650403621 is 12630405616.

It is a cyclic number.

It is not a de Polignac number, because 61650403621 - 2¹⁷ = 61650272549 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 (61650463621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2823496 + ... + 2845246.

It is an arithmetic number, because the mean of its divisors is an integer number (4005609048).

Almost surely, 2^61650403621 is an apocalyptic number.

It is an amenable number.

61650403621 is a deficient number, since it is larger than the sum of its proper divisors (2439341147).

61650403621 is a wasteful number, since it uses less digits than its factorization.

61650403621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22812.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 61650403621 in words is "sixty-one billion, six hundred fifty million, four hundred three thousand, six hundred twenty-one".