61551512003 has 4 divisors (see below), whose sum is σ = 61659308568. Its totient is φ = 61443715440.

The previous prime is 61551511993. The next prime is 61551512021. The reversal of 61551512003 is 30021515516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61551512003 - 2¹² = 61551507907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61551512303) 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, 53897426 + ... + 53898567.

It is an arithmetic number, because the mean of its divisors is an integer number (15414827142).

Almost surely, 2^61551512003 is an apocalyptic number.

61551512003 is a deficient number, since it is larger than the sum of its proper divisors (107796565).

61551512003 is a wasteful number, since it uses less digits than its factorization.

61551512003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107796564.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 61551512003 in words is "sixty-one billion, five hundred fifty-one million, five hundred twelve thousand, three".