61403202750 has 128 divisors (see below), whose sum is σ = 156341352960. Its totient is φ = 16046976000.

The previous prime is 61403202739. The next prime is 61403202821. The reversal of 61403202750 is 5720230416.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15618285 + ... + 15622215.

It is an arithmetic number, because the mean of its divisors is an integer number (1221416820).

Almost surely, 2^61403202750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61403202750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78170676480).

61403202750 is an abundant number, since it is smaller than the sum of its proper divisors (94938150210).

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

61403202750 is a wasteful number, since it uses less digits than its factorization.

61403202750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363 (or 4353 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 61403202750 in words is "sixty-one billion, four hundred three million, two hundred two thousand, seven hundred fifty".