1620370773 has 48 divisors (see below), whose sum is σ = 2706552576. Its totient is φ = 915045120.

The previous prime is 1620370753. The next prime is 1620370777. The reversal of 1620370773 is 3770730261.

It is not a de Polignac number, because 1620370773 - 2⁶ = 1620370709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620370777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2451063 + ... + 2451723.

It is an arithmetic number, because the mean of its divisors is an integer number (56386512).

Almost surely, 2^1620370773 is an apocalyptic number.

It is an amenable number.

1620370773 is a deficient number, since it is larger than the sum of its proper divisors (1086181803).

1620370773 is a wasteful number, since it uses less digits than its factorization.

1620370773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 37044, while the sum is 36.

The square root of 1620370773 is about 40253.8292961055. The cubic root of 1620370773 is about 1174.5498859615.

The spelling of 1620370773 in words is "one billion, six hundred twenty million, three hundred seventy thousand, seven hundred seventy-three".