145894394970 has 80 divisors (see below), whose sum is σ = 392637155328. Its totient is φ = 38871122400.

The previous prime is 145894394959. The next prime is 145894394977. The reversal of 145894394970 is 79493498541.

145894394970 is a `hidden beast` number, since 1 + 4 + 58 + 94 + 3 + 9 + 497 + 0 = 666.

It is a super-2 number, since 2×145894394970² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145894394898 and 145894394907.

It is not an unprimeable number, because it can be changed into a prime (145894394977) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 854067 + ... + 1010553.

Almost surely, 2^145894394970 is an apocalyptic number.

145894394970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145894394970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196318577664).

145894394970 is an abundant number, since it is smaller than the sum of its proper divisors (246742760358).

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

145894394970 is a wasteful number, since it uses less digits than its factorization.

145894394970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157657 (or 157648 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 145894394970 in words is "one hundred forty-five billion, eight hundred ninety-four million, three hundred ninety-four thousand, nine hundred seventy".