1961555002 has 32 divisors (see below), whose sum is σ = 3233384640. Its totient is φ = 885098880.

The previous prime is 1961554999. The next prime is 1961555021. The reversal of 1961555002 is 2005551691.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2492053 + ... + 2492839.

It is an arithmetic number, because the mean of its divisors is an integer number (101043270).

Almost surely, 2^1961555002 is an apocalyptic number.

1961555002 is a deficient number, since it is larger than the sum of its proper divisors (1271829638).

1961555002 is a wasteful number, since it uses less digits than its factorization.

1961555002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486.

The product of its (nonzero) digits is 13500, while the sum is 34.

The square root of 1961555002 is about 44289.4457179134. The cubic root of 1961555002 is about 1251.7958192178.

Subtracting 1961555002 from its reverse (2005551691), we obtain a square (43996689 = 6633²).

The spelling of 1961555002 in words is "one billion, nine hundred sixty-one million, five hundred fifty-five thousand, two".