60555531621 has 8 divisors (see below), whose sum is σ = 86951532640. Its totient is φ = 37264942512.

The previous prime is 60555531563. The next prime is 60555531691. The reversal of 60555531621 is 12613555506.

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

It is not a de Polignac number, because 60555531621 - 2⁷ = 60555531493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1552705939 = 60555531621 / (6 + 0 + 5 + 5 + 5 + 5 + 3 + 1 + 6 + 2 + 1).

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 60555531621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60555531691) 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, 776352931 + ... + 776353008.

It is an arithmetic number, because the mean of its divisors is an integer number (10868941580).

Almost surely, 2^60555531621 is an apocalyptic number.

It is an amenable number.

60555531621 is a deficient number, since it is larger than the sum of its proper divisors (26396001019).

60555531621 is a wasteful number, since it uses less digits than its factorization.

60555531621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552705955.

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 60555531621 in words is "sixty billion, five hundred fifty-five million, five hundred thirty-one thousand, six hundred twenty-one".