61993228501 has 4 divisors (see below), whose sum is σ = 62021371072. Its totient is φ = 61965085932.

The previous prime is 61993228487. The next prime is 61993228511. The reversal of 61993228501 is 10582239916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61993228501 - 2¹³ = 61993220309 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 (61993228511) 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, 14067981 + ... + 14072386.

It is an arithmetic number, because the mean of its divisors is an integer number (15505342768).

Almost surely, 2^61993228501 is an apocalyptic number.

It is an amenable number.

61993228501 is a deficient number, since it is larger than the sum of its proper divisors (28142571).

61993228501 is a wasteful number, since it uses less digits than its factorization.

61993228501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28142570.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 61993228501 in words is "sixty-one billion, nine hundred ninety-three million, two hundred twenty-eight thousand, five hundred one".