61951393700 has 144 divisors (see below), whose sum is σ = 155014495104. Its totient is φ = 21051187200.

The previous prime is 61951393687. The next prime is 61951393709. The reversal of 61951393700 is 739315916.

It is not an unprimeable number, because it can be changed into a prime (61951393709) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65835230 + ... + 65836170.

Almost surely, 2^61951393700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61951393700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77507247552).

61951393700 is an abundant number, since it is smaller than the sum of its proper divisors (93063101404).

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

61951393700 is a wasteful number, since it uses less digits than its factorization.

61951393700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702 (or 1695 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 44.

The spelling of 61951393700 in words is "sixty-one billion, nine hundred fifty-one million, three hundred ninety-three thousand, seven hundred".