2621531377 has 2 divisors, whose sum is σ = 2621531378. Its totient is φ = 2621531376.

The previous prime is 2621531323. The next prime is 2621531387. The reversal of 2621531377 is 7731351262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2583078976 + 38452401 = 50824^2 + 6201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621531377 is a prime.

It is a super-2 number, since 2×2621531377² = 13744853521191032258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2621531317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310765688 + 1310765689.

It is an arithmetic number, because the mean of its divisors is an integer number (1310765689).

Almost surely, 2^2621531377 is an apocalyptic number.

It is an amenable number.

2621531377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2621531377 is an equidigital number, since it uses as much as digits as its factorization.

2621531377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 37.

The square root of 2621531377 is about 51200.8923457394. The cubic root of 2621531377 is about 1378.8542224123.

The spelling of 2621531377 in words is "two billion, six hundred twenty-one million, five hundred thirty-one thousand, three hundred seventy-seven".