61074523381 has 4 divisors (see below), whose sum is σ = 64288972000. Its totient is φ = 57860074764.

The previous prime is 61074523337. The next prime is 61074523399. The reversal of 61074523381 is 18332547016.

61074523381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61074523381 - 2⁷ = 61074523253 is a prime.

It is a super-2 number, since 2×61074523381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61074523481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1607224281 + ... + 1607224318.

It is an arithmetic number, because the mean of its divisors is an integer number (16072243000).

Almost surely, 2^61074523381 is an apocalyptic number.

It is an amenable number.

61074523381 is a deficient number, since it is larger than the sum of its proper divisors (3214448619).

61074523381 is a wasteful number, since it uses less digits than its factorization.

61074523381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214448618.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 61074523381 in words is "sixty-one billion, seventy-four million, five hundred twenty-three thousand, three hundred eighty-one".