776602641620 has 96 divisors (see below), whose sum is σ = 1795512434688. Its totient is φ = 280358733312.

The previous prime is 776602641611. The next prime is 776602641629. The reversal of 776602641620 is 26146206677.

It is an interprime number because it is at equal distance from previous prime (776602641611) and next prime (776602641629).

It is a super-2 number, since 2×776602641620² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776602641629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12151469 + ... + 12215211.

It is an arithmetic number, because the mean of its divisors is an integer number (18703254528).

Almost surely, 2^776602641620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 776602641620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897756217344).

776602641620 is an abundant number, since it is smaller than the sum of its proper divisors (1018909793068).

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

776602641620 is a wasteful number, since it uses less digits than its factorization.

776602641620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64809 (or 64807 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 776602641620 in words is "seven hundred seventy-six billion, six hundred two million, six hundred forty-one thousand, six hundred twenty".