612071645 has 8 divisors (see below), whose sum is σ = 734952120. Its totient is φ = 489346560.

The previous prime is 612071633. The next prime is 612071659. The reversal of 612071645 is 546170216.

It can be written as a sum of positive squares in 4 ways, for example, as 61042969 + 551028676 = 7813^2 + 23474^2 .

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

It is not a de Polignac number, because 612071645 - 2⁸ = 612071389 is a prime.

It is a super-2 number, since 2×612071645² = 749263397226012050, which 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, 29996 + ... + 46085.

It is an arithmetic number, because the mean of its divisors is an integer number (91869015).

Almost surely, 2^612071645 is an apocalyptic number.

It is an amenable number.

612071645 is a deficient number, since it is larger than the sum of its proper divisors (122880475).

612071645 is a wasteful number, since it uses less digits than its factorization.

612071645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77695.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 612071645 is about 24740.0817500670. The cubic root of 612071645 is about 849.0516042649.

The spelling of 612071645 in words is "six hundred twelve million, seventy-one thousand, six hundred forty-five".