39920537951268 has 96 divisors (see below), whose sum is σ = 102770812392192. Its totient is φ = 11982367948800.

The previous prime is 39920537951267. The next prime is 39920537951269. The reversal of 39920537951268 is 86215973502993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39920537951267) and next prime (39920537951269).

It is not an unprimeable number, because it can be changed into a prime (39920537951267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60259873 + ... + 60918743.

It is an arithmetic number, because the mean of its divisors is an integer number (1070529295752).

Almost surely, 2^{39920537951268} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39920537951268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51385406196096).

39920537951268 is an abundant number, since it is smaller than the sum of its proper divisors (62850274440924).

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

39920537951268 is a wasteful number, since it uses less digits than its factorization.

39920537951268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668405 (or 668403 counting only the distinct ones).

The product of its (nonzero) digits is 220449600, while the sum is 69.

The spelling of 39920537951268 in words is "thirty-nine trillion, nine hundred twenty billion, five hundred thirty-seven million, nine hundred fifty-one thousand, two hundred sixty-eight".