39975121770 has 128 divisors (see below), whose sum is σ = 99694167552. Its totient is φ = 10251571200.

The previous prime is 39975121757. The next prime is 39975121787. The reversal of 39975121770 is 7712157993.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26455315 + ... + 26456825.

It is an arithmetic number, because the mean of its divisors is an integer number (778860684).

Almost surely, 2^39975121770 is an apocalyptic number.

39975121770 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 39975121770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49847083776).

39975121770 is an abundant number, since it is smaller than the sum of its proper divisors (59719045782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39975121770 is a wasteful number, since it uses less digits than its factorization.

39975121770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 833490, while the sum is 51.

The spelling of 39975121770 in words is "thirty-nine billion, nine hundred seventy-five million, one hundred twenty-one thousand, seven hundred seventy".