61672125680 has 80 divisors (see below), whose sum is σ = 157046698368. Its totient is φ = 22336800000.

The previous prime is 61672125643. The next prime is 61672125727. The reversal of 61672125680 is 8652127616.

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 (44).

It is a congruent number.

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, 81275 + ... + 360485.

Almost surely, 2^61672125680 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 61672125680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78523349184).

61672125680 is an abundant number, since it is smaller than the sum of its proper divisors (95374572688).

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

61672125680 is a wasteful number, since it uses less digits than its factorization.

61672125680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279486 (or 279480 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 61672125680 in words is "sixty-one billion, six hundred seventy-two million, one hundred twenty-five thousand, six hundred eighty".