145642172670 has 48 divisors (see below), whose sum is σ = 378938729520. Its totient is φ = 38810314752.

The previous prime is 145642172651. The next prime is 145642172699. The reversal of 145642172670 is 76271246541.

145642172670 is a `hidden beast` number, since 1 + 4 + 564 + 2 + 17 + 2 + 6 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447444 + ... + 701063.

It is an arithmetic number, because the mean of its divisors is an integer number (7894556865).

Almost surely, 2^145642172670 is an apocalyptic number.

145642172670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145642172670 is an abundant number, since it is smaller than the sum of its proper divisors (233296556850).

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

145642172670 is a wasteful number, since it uses less digits than its factorization.

145642172670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149929 (or 1149926 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 145642172670 in words is "one hundred forty-five billion, six hundred forty-two million, one hundred seventy-two thousand, six hundred seventy".