61379748992 has 64 divisors (see below), whose sum is σ = 124721520000. Its totient is φ = 30082710528.

The previous prime is 61379748977. The next prime is 61379749021. The reversal of 61379748992 is 29984797316.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1383734 + ... + 1427402.

It is an arithmetic number, because the mean of its divisors is an integer number (1948773750).

Almost surely, 2^61379748992 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 61379748992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62360760000).

61379748992 is an abundant number, since it is smaller than the sum of its proper divisors (63341771008).

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

61379748992 is a wasteful number, since it uses less digits than its factorization.

61379748992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43901 (or 43889 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 65.

The spelling of 61379748992 in words is "sixty-one billion, three hundred seventy-nine million, seven hundred forty-eight thousand, nine hundred ninety-two".