61500780379 has 16 divisors (see below), whose sum is σ = 64462224384. Its totient is φ = 58563648000.

The previous prime is 61500780307. The next prime is 61500780391. The reversal of 61500780379 is 97308700516.

It is a cyclic number.

It is not a de Polignac number, because 61500780379 - 2⁷ = 61500780251 is a prime.

It is a super-3 number, since 3×61500780379³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61500780479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9975952 + ... + 9982114.

It is an arithmetic number, because the mean of its divisors is an integer number (4028889024).

Almost surely, 2^61500780379 is an apocalyptic number.

61500780379 is a deficient number, since it is larger than the sum of its proper divisors (2961444005).

61500780379 is a wasteful number, since it uses less digits than its factorization.

61500780379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 61500780379 in words is "sixty-one billion, five hundred million, seven hundred eighty thousand, three hundred seventy-nine".