145403630442556 has 24 divisors (see below), whose sum is σ = 256932005016960. Its totient is φ = 71994514733232.

The previous prime is 145403630442449. The next prime is 145403630442571. The reversal of 145403630442556 is 655244036304541.

It is a super-2 number, since 2×145403630442556² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16944735 + ... + 24040201.

It is an arithmetic number, because the mean of its divisors is an integer number (10705500209040).

Almost surely, 2^{145403630442556} is an apocalyptic number.

It is an amenable number.

145403630442556 is a deficient number, since it is larger than the sum of its proper divisors (111528374574404).

145403630442556 is a wasteful number, since it uses less digits than its factorization.

145403630442556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145313 (or 7145311 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 52.

The spelling of 145403630442556 in words is "one hundred forty-five trillion, four hundred three billion, six hundred thirty million, four hundred forty-two thousand, five hundred fifty-six".