61348421520 has 120 divisors (see below), whose sum is σ = 213659199936. Its totient is φ = 16359573888.

The previous prime is 61348421507. The next prime is 61348421527. The reversal of 61348421520 is 2512484316.

It is a happy number.

61348421520 is a `hidden beast` number, since 6 + 1 + 34 + 84 + 21 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×61348421520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61348421527) by changing a digit.

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, 1558452 + ... + 1597331.

Almost surely, 2^61348421520 is an apocalyptic number.

61348421520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61348421520 is an abundant number, since it is smaller than the sum of its proper divisors (152310778416).

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

61348421520 is a wasteful number, since it uses less digits than its factorization.

61348421520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155811 (or 3155793 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 61348421520 in words is "sixty-one billion, three hundred forty-eight million, four hundred twenty-one thousand, five hundred twenty".