145331849393956 has 27 divisors (see below), whose sum is σ = 257865567876273. Its totient is φ = 71669633084640.

The previous prime is 145331849393933. The next prime is 145331849393959. The reversal of 145331849393956 is 659393948133541.

The square root of 145331849393956 is 12055366.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 82497437496100 + 62834411897856 = 9082810^2 + 7926816^2 .

It is a super-2 number, since 2×145331849393956² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is not an unprimeable number, because it can be changed into a prime (145331849393959) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1760042151 + ... + 1760124721.

Almost surely, 2^{145331849393956} is an apocalyptic number.

145331849393956 is the 12055366-th square number.

It is an amenable number.

145331849393956 is a deficient number, since it is larger than the sum of its proper divisors (112533718482317).

145331849393956 is an frugal number, since it uses more digits than its factorization.

145331849393956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165292 (or 82646 counting only the distinct ones).

The product of its digits is 1133740800, while the sum is 73.

The spelling of 145331849393956 in words is "one hundred forty-five trillion, three hundred thirty-one billion, eight hundred forty-nine million, three hundred ninety-three thousand, nine hundred fifty-six".