61506601567621 has 16 divisors (see below), whose sum is σ = 70303808512000. Its totient is φ = 52712032784688.

The previous prime is 61506601567573. The next prime is 61506601567637. The reversal of 61506601567621 is 12676510660516.

It is a cyclic number.

It is not a de Polignac number, because 61506601567621 - 2⁹ = 61506601567109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506601567921) 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, 2174977960 + ... + 2175006238.

It is an arithmetic number, because the mean of its divisors is an integer number (4393988032000).

Almost surely, 2^{61506601567621} is an apocalyptic number.

It is an amenable number.

61506601567621 is a deficient number, since it is larger than the sum of its proper divisors (8797206944379).

61506601567621 is a wasteful number, since it uses less digits than its factorization.

61506601567621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63928.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 61506601567621 in words is "sixty-one trillion, five hundred six billion, six hundred one million, five hundred sixty-seven thousand, six hundred twenty-one".