61534136503 has 16 divisors (see below), whose sum is σ = 71025776640. Its totient is φ = 52218023616.

The previous prime is 61534136501. The next prime is 61534136507. The reversal of 61534136503 is 30563143516.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61534136503 - 2¹ = 61534136501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61534136501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3624651 + ... + 3641587.

It is an arithmetic number, because the mean of its divisors is an integer number (4439111040).

Almost surely, 2^61534136503 is an apocalyptic number.

61534136503 is a deficient number, since it is larger than the sum of its proper divisors (9491640137).

61534136503 is a wasteful number, since it uses less digits than its factorization.

61534136503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22086.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 61534136503 in words is "sixty-one billion, five hundred thirty-four million, one hundred thirty-six thousand, five hundred three".