61154867380 has 96 divisors (see below), whose sum is σ = 136920430080. Its totient is φ = 22864343040.

The previous prime is 61154867369. The next prime is 61154867393. The reversal of 61154867380 is 8376845116.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34297969 + ... + 34299751.

It is an arithmetic number, because the mean of its divisors is an integer number (1426254480).

Almost surely, 2^61154867380 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 61154867380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68460215040).

61154867380 is an abundant number, since it is smaller than the sum of its proper divisors (75765562700).

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

61154867380 is a wasteful number, since it uses less digits than its factorization.

61154867380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 61154867380 in words is "sixty-one billion, one hundred fifty-four million, eight hundred sixty-seven thousand, three hundred eighty".