61641147476123 has 4 divisors (see below), whose sum is σ = 63629571588288. Its totient is φ = 59652723363960.

The previous prime is 61641147476119. The next prime is 61641147476131. The reversal of 61641147476123 is 32167474114616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61641147476123 - 2² = 61641147476119 is a prime.

It is a super-2 number, since 2×61641147476123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61641147476423) 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, 994212056036 + ... + 994212056097.

It is an arithmetic number, because the mean of its divisors is an integer number (15907392897072).

Almost surely, 2^{61641147476123} is an apocalyptic number.

61641147476123 is a deficient number, since it is larger than the sum of its proper divisors (1988424112165).

61641147476123 is a wasteful number, since it uses less digits than its factorization.

61641147476123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988424112164.

The product of its digits is 4064256, while the sum is 53.

The spelling of 61641147476123 in words is "sixty-one trillion, six hundred forty-one billion, one hundred forty-seven million, four hundred seventy-six thousand, one hundred twenty-three".