61520503451 has 8 divisors (see below), whose sum is σ = 67641729024. Its totient is φ = 55487353320.

The previous prime is 61520503417. The next prime is 61520503453. The reversal of 61520503451 is 15430502516.

61520503451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61520503451 - 2¹⁰ = 61520502427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61520503453) 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, 22017395 + ... + 22020188.

It is an arithmetic number, because the mean of its divisors is an integer number (8455216128).

Almost surely, 2^61520503451 is an apocalyptic number.

61520503451 is a deficient number, since it is larger than the sum of its proper divisors (6121225573).

61520503451 is a wasteful number, since it uses less digits than its factorization.

61520503451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44037721.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 61520503451 in words is "sixty-one billion, five hundred twenty million, five hundred three thousand, four hundred fifty-one".