145715993237 has 8 divisors (see below), whose sum is σ = 146298197304. Its totient is φ = 145134367168.

The previous prime is 145715993191. The next prime is 145715993261. The reversal of 145715993237 is 732399517541.

It can be written as a sum of positive squares in 4 ways, for example, as 57106182961 + 88609810276 = 238969^2 + 297674^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 145715993237 - 2⁶ = 145715993173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145715998237) 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, 364283 + ... + 651255.

It is an arithmetic number, because the mean of its divisors is an integer number (18287274663).

Almost surely, 2^145715993237 is an apocalyptic number.

It is an amenable number.

145715993237 is a deficient number, since it is larger than the sum of its proper divisors (582204067).

145715993237 is a wasteful number, since it uses less digits than its factorization.

145715993237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288999.

The product of its digits is 7144200, while the sum is 56.

The spelling of 145715993237 in words is "one hundred forty-five billion, seven hundred fifteen million, nine hundred ninety-three thousand, two hundred thirty-seven".