39154094644 has 72 divisors (see below), whose sum is σ = 81162904200. Its totient is φ = 16474752000.

The previous prime is 39154094611. The next prime is 39154094647. The reversal of 39154094644 is 44649045193.

It can be written as a sum of positive squares in 4 ways, for example, as 93315600 + 39060779044 = 9660^2 + 197638^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39154094647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7182832 + ... + 7188280.

Almost surely, 2^39154094644 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 39154094644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40581452100).

39154094644 is an abundant number, since it is smaller than the sum of its proper divisors (42008809556).

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

39154094644 is a wasteful number, since it uses less digits than its factorization.

39154094644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129 (or 6120 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 39154094644 in words is "thirty-nine billion, one hundred fifty-four million, ninety-four thousand, six hundred forty-four".