61910037504 has 704 divisors, whose sum is σ = 229400248320. Its totient is φ = 16084500480.

The previous prime is 61910037481. The next prime is 61910037517. The reversal of 61910037504 is 40573001916.

61910037504 is a `hidden beast` number, since 6 + 19 + 100 + 37 + 504 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101993169 + ... + 101993775.

Almost surely, 2^61910037504 is an apocalyptic number.

61910037504 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61910037504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114700124160).

61910037504 is an abundant number, since it is smaller than the sum of its proper divisors (167490210816).

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

61910037504 is a wasteful number, since it uses less digits than its factorization.

61910037504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 61910037504 in words is "sixty-one billion, nine hundred ten million, thirty-seven thousand, five hundred four".