157961939439 has 8 divisors (see below), whose sum is σ = 211908042112. Its totient is φ = 104661898200.

The previous prime is 157961939437. The next prime is 157961939461. The reversal of 157961939439 is 934939169751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157961939439 - 2¹ = 157961939437 is a prime.

It is a super-2 number, since 2×157961939439² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157961939439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157961939431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161514787 + ... + 161515764.

It is an arithmetic number, because the mean of its divisors is an integer number (26488505264).

Almost surely, 2^157961939439 is an apocalyptic number.

157961939439 is a deficient number, since it is larger than the sum of its proper divisors (53946102673).

157961939439 is a wasteful number, since it uses less digits than its factorization.

157961939439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323030717.

The product of its digits is 49601160, while the sum is 66.

The spelling of 157961939439 in words is "one hundred fifty-seven billion, nine hundred sixty-one million, nine hundred thirty-nine thousand, four hundred thirty-nine".