61542873005972 has 12 divisors (see below), whose sum is σ = 107740349766336. Its totient is φ = 30759915929880.

The previous prime is 61542873005969. The next prime is 61542873005987. The reversal of 61542873005972 is 27950037824516.

It is a super-3 number, since 3×61542873005972³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2880131258 + ... + 2880152625.

It is an arithmetic number, because the mean of its divisors is an integer number (8978362480528).

It is a 2-persistent number, because it is pandigital, and so is 2⋅61542873005972 = 123085746011944, but 3⋅61542873005972 = 184628619017916 is not.

Almost surely, 2^{61542873005972} is an apocalyptic number.

It is an amenable number.

61542873005972 is a deficient number, since it is larger than the sum of its proper divisors (46197476760364).

61542873005972 is a wasteful number, since it uses less digits than its factorization.

61542873005972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760286558 (or 5760286556 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 61542873005972 in words is "sixty-one trillion, five hundred forty-two billion, eight hundred seventy-three million, five thousand, nine hundred seventy-two".