61534131501 has 16 divisors (see below), whose sum is σ = 82184932800. Its totient is φ = 40953090048.

The previous prime is 61534131499. The next prime is 61534131511. The reversal of 61534131501 is 10513143516.

It is not a de Polignac number, because 61534131501 - 2¹ = 61534131499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61534131511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7855855 + ... + 7863683.

It is an arithmetic number, because the mean of its divisors is an integer number (5136558300).

Almost surely, 2^61534131501 is an apocalyptic number.

It is an amenable number.

61534131501 is a deficient number, since it is larger than the sum of its proper divisors (20650801299).

61534131501 is a wasteful number, since it uses less digits than its factorization.

61534131501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11948.

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 61534131501 in words is "sixty-one billion, five hundred thirty-four million, one hundred thirty-one thousand, five hundred one".