61672151992 has 64 divisors (see below), whose sum is σ = 128571494400. Its totient is φ = 27499127040.

The previous prime is 61672151951. The next prime is 61672151993. The reversal of 61672151992 is 29915127616.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61672151993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 963663 + ... + 1025665.

It is an arithmetic number, because the mean of its divisors is an integer number (2008929600).

Almost surely, 2^61672151992 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 61672151992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64285747200).

61672151992 is an abundant number, since it is smaller than the sum of its proper divisors (66899342408).

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

61672151992 is a wasteful number, since it uses less digits than its factorization.

61672151992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62236 (or 62232 counting only the distinct ones).

The product of its digits is 408240, while the sum is 49.

The spelling of 61672151992 in words is "sixty-one billion, six hundred seventy-two million, one hundred fifty-one thousand, nine hundred ninety-two".