642612061503 has 24 divisors (see below), whose sum is σ = 933964574400. Its totient is φ = 425763468864.

The previous prime is 642612061489. The next prime is 642612061513. The reversal of 642612061503 is 305160216246.

642612061503 is a `hidden beast` number, since 6 + 4 + 26 + 12 + 0 + 615 + 0 + 3 = 666.

It is not a de Polignac number, because 642612061503 - 2¹³ = 642612053311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642612061513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 638458 + ... + 1301096.

It is an arithmetic number, because the mean of its divisors is an integer number (38915190600).

Almost surely, 2^642612061503 is an apocalyptic number.

642612061503 is a deficient number, since it is larger than the sum of its proper divisors (291352512897).

642612061503 is a wasteful number, since it uses less digits than its factorization.

642612061503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663311 (or 663308 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 642612061503 its reverse (305160216246), we get a palindrome (947772277749).

It can be divided in two parts, 64261 and 2061503, that added together give a square (2125764 = 1458²).

The spelling of 642612061503 in words is "six hundred forty-two billion, six hundred twelve million, sixty-one thousand, five hundred three".