61498755120 has 80 divisors (see below), whose sum is σ = 207977617152. Its totient is φ = 14908788480.

The previous prime is 61498755107. The next prime is 61498755193. The reversal of 61498755120 is 2155789416.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 61498755120.

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, 11644852 + ... + 11650131.

Almost surely, 2^61498755120 is an apocalyptic number.

61498755120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61498755120 is an abundant number, since it is smaller than the sum of its proper divisors (146478862032).

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

61498755120 is a wasteful number, since it uses less digits than its factorization.

61498755120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23295010 (or 23295004 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

It can be divided in two parts, 61498 and 755120, that added together give a palindrome (816618).

The spelling of 61498755120 in words is "sixty-one billion, four hundred ninety-eight million, seven hundred fifty-five thousand, one hundred twenty".