61631501203541 has 4 divisors (see below), whose sum is σ = 64875264424800. Its totient is φ = 58387737982284.

The previous prime is 61631501203483. The next prime is 61631501203549. The reversal of 61631501203541 is 14530210513616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61631501203541 - 2³⁸ = 61356623296597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61631501203495 and 61631501203504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61631501203549) 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, 1621881610601 + ... + 1621881610638.

It is an arithmetic number, because the mean of its divisors is an integer number (16218816106200).

Almost surely, 2^{61631501203541} is an apocalyptic number.

It is an amenable number.

61631501203541 is a deficient number, since it is larger than the sum of its proper divisors (3243763221259).

61631501203541 is a wasteful number, since it uses less digits than its factorization.

61631501203541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243763221258.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 61631501203541 in words is "sixty-one trillion, six hundred thirty-one billion, five hundred one million, two hundred three thousand, five hundred forty-one".