61455120534 has 48 divisors (see below), whose sum is σ = 133585949952. Its totient is φ = 20418504624.

The previous prime is 61455120509. The next prime is 61455120583. The reversal of 61455120534 is 43502155416.

61455120534 is a `hidden beast` number, since 61 + 4 + 55 + 12 + 0 + 534 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7990839 + ... + 7998525.

It is an arithmetic number, because the mean of its divisors is an integer number (2783040624).

Almost surely, 2^61455120534 is an apocalyptic number.

61455120534 is an abundant number, since it is smaller than the sum of its proper divisors (72130829418).

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

61455120534 is a wasteful number, since it uses less digits than its factorization.

61455120534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9081 (or 9078 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 61455120534 in words is "sixty-one billion, four hundred fifty-five million, one hundred twenty thousand, five hundred thirty-four".