61505531522000 has 160 divisors (see below), whose sum is σ = 159114126163200. Its totient is φ = 22925270592000.

The previous prime is 61505531521969. The next prime is 61505531522021. The reversal of 61505531522000 is 22513550516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10948940 + ... + 15584939.

It is an arithmetic number, because the mean of its divisors is an integer number (994463288520).

Almost surely, 2^{61505531522000} is an apocalyptic number.

It is an amenable number.

61505531522000 is an abundant number, since it is smaller than the sum of its proper divisors (97608594641200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61505531522000 is a wasteful number, since it uses less digits than its factorization.

61505531522000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26533982 (or 26533966 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 61505531522000 in words is "sixty-one trillion, five hundred five billion, five hundred thirty-one million, five hundred twenty-two thousand".