61505546460 has 48 divisors (see below), whose sum is σ = 172229815296. Its totient is φ = 16400118592.

The previous prime is 61505546447. The next prime is 61505546471. The reversal of 61505546460 is 6464550516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 837337 + ... + 907823.

It is an arithmetic number, because the mean of its divisors is an integer number (3588121152).

Almost surely, 2^61505546460 is an apocalyptic number.

61505546460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61505546460 is an abundant number, since it is smaller than the sum of its proper divisors (110724268836).

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

61505546460 is a wasteful number, since it uses less digits than its factorization.

61505546460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85042 (or 85040 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 61505546460 in words is "sixty-one billion, five hundred five million, five hundred forty-six thousand, four hundred sixty".