39477985972 has 6 divisors (see below), whose sum is σ = 69086475458. Its totient is φ = 19738992984.

The previous prime is 39477985949. The next prime is 39477985991. The reversal of 39477985972 is 27958977493.

It can be written as a sum of positive squares in only one way, i.e., 21976283536 + 17501702436 = 148244^2 + 132294^2 .

It is a super-2 number, since 2×39477985972² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4934748243 + ... + 4934748250.

Almost surely, 2^39477985972 is an apocalyptic number.

It is an amenable number.

39477985972 is a deficient number, since it is larger than the sum of its proper divisors (29608489486).

39477985972 is a wasteful number, since it uses less digits than its factorization.

39477985972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9869496497 (or 9869496495 counting only the distinct ones).

The product of its digits is 240045120, while the sum is 70.

The spelling of 39477985972 in words is "thirty-nine billion, four hundred seventy-seven million, nine hundred eighty-five thousand, nine hundred seventy-two".