1620617677 has 8 divisors (see below), whose sum is σ = 1855910592. Its totient is φ = 1386268800.

The previous prime is 1620617639. The next prime is 1620617681. The reversal of 1620617677 is 7767160261.

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

It is not a de Polignac number, because 1620617677 - 2⁷ = 1620617549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620617077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232324 + ... + 239197.

It is an arithmetic number, because the mean of its divisors is an integer number (231988824).

Almost surely, 2^1620617677 is an apocalyptic number.

It is an amenable number.

1620617677 is a deficient number, since it is larger than the sum of its proper divisors (235292915).

1620617677 is an equidigital number, since it uses as much as digits as its factorization.

1620617677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472019.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 1620617677 is about 40256.8960179495. The cubic root of 1620617677 is about 1174.6095402788.

The spelling of 1620617677 in words is "one billion, six hundred twenty million, six hundred seventeen thousand, six hundred seventy-seven".